Ever tried on a pair of Muck boots online and felt like you were wearing someone else’s shoes? Yeah, we’ve all been there.
Muck Boots are tough, waterproof, and built for the elements—but if you get the sizing wrong, you’ll either be swimming in them or squeezing your toes like a sardine can.
To make things even more frustrating, most of Muck’s sizing info is printed on the shoebox—which isn’t exactly helpful when you’re shopping online. So, if you’ve been scratching your head trying to figure out the right fit, you’re not alone.
So, are Muck Boots true to size? Should you go bigger for thick socks? And what if you’re stuck between two sizes?
That’s why we’re breaking it all down in this guide—so you can get the perfect fit the first time.
In this guide, we’ve got you covered with everything you need to know about Muck Boot sizing—whether it’s fit tips, size charts, sock size conversions, width options, or pro tips for measuring your feet.
Because let’s be honest, life’s too short for uncomfortable boots.
And hey, if you’re also curious about how Bogs boots fit, we’ve got you covered there too. Check out our Bogs sizing guide for all the tips and tricks — and don’t forget to browse our full Hunter size chart and sizing guide to lock in the right fit for your Wellies.
Let’s dive right into it…
Muck Boot Sizing
Muck boots are generally true to size, but there are some pitfalls to their sizing that you need to be aware of.
1. The Most Important Rule: The Ball of Your Foot Matters
The key to a well-fitting Muck Boot isn’t just about the number on the box—it’s about where your foot sits inside the boot. The widest part of your foot (the ball) needs to align with the widest part of the boot. If it doesn’t, you’re in for some fit issues.
Why does this matter? Because Muck Boots have built-in support for your heel, arch, and metatarsals. When your foot sits in the right spot, everything is working as it should.
But if you’re too far forward or too far back, the boot doesn’t flex where it’s supposed to. That’s when you start feeling discomfort and even that annoying heel slip.
And, if you’ve ever wondered why your boots felt great at first but wore out fast, this could be the reason. So, make sure your foot sits in the right place—it makes all the difference.
Related:
Muck Boots and Bunny Boots are both designed for cold weather, but how do Bunny Boots fit?
2. Heel-to-Toe Fit:
Muck Boots, like Xtratuf boots, are designed with about 15mm of extra space in the toe area. This gives your feet some wiggle room, but it can also trick you into thinking they’re too big.
Here’s the test:
- If your boots feel tight or pinch your toes, size up.
- If they crease excessively around the ankle when you walk, they’re too big.
- If they slip off your heel too much, they’re too big.
A little movement is fine, but you don’t want to feel like your feet are swimming.
Related:
Winter boots need a special kind of fit. Want to know what that looks like? Check out our guide on how winter boots should fit!
3. Socks: Your Secret Weapon
Socks can make or break your boot fit, so always try on your Muck Boots with the socks you actually plan to wear.
- If you always wear thick socks, consider sizing up.
- If your boots feel roomy, layering socks can help.
- Narrow feet? Thick socks are your best friend.
Muck is one of the only brands that actually provides a sock size guide to help you out:
- Medium (MD): Fits men’s sizes 5–9.5
- Large (LG): Fits men’s sizes 9–12
- Extra Large (XL) & XXL (2L): Bigger sizes (and yes, XXL looks more like a sleeve than a sock)
These are Muck Boots shoe size to sock size conversion charts…
Related:
Wondering how ski boots should fit before hitting the snow? Our ski boot fitting guide has all the info you need!
Muck Boots Shoe Size to Sock Size Conversion Chart
Want your Muck Boots to feel just right? Then you need the right sock size because socks can change how your boots fit! The last thing you want is socks that are too tight or too loose, bunching up and driving you crazy.
The chart below helps you match your shoe size to the perfect sock size…
| Sock | Ladies' Shoe Size | Mens' Shoe Size | UK Shoe Size | EUR Shoe Size |
|---|---|---|---|---|
| YL | 3-5 | 10-3 | 28-31 | |
| YX | 4-7 | 3-5 1/2 | 32-38 | |
| SM/MS | 4-7 | 3-5 1/2 | 32-38 | |
| MD | 6-10 | 5-9 1/2 | 5-8 | 37-42 |
| LG | 10-13 | 9-12 | 8-11 1/2 | 43-47 |
| XL | 12-15 | 12-14 | 47-50 | |
| 2L | 15-17 | 15+ | 51+ |
Related:
If you’re unsure about Danner boot sizing, we’ve got you covered. Our guide will help you understand the best size for your feet.
| Sock | Youth Shoe Size |
|---|---|
| YS | 4-7 Toddler |
| YM | 7-10 Toddler |
| YL | 10-2 |
| YX | 1-5 |
| SM/MS | 1-5 |
4. Unisex vs. Women’s Sizing:
Muck Boots come in both unisex and women’s sizes, but unisex styles follow men’s sizing. During the company’s growth, they added a women-specific line, which (you guessed it) follows women’s sizing instead of unisex sizing.
While women’s-specific Muck Boots are designed differently, if you have wider feet, unisex styles might actually be the better option.
So…
- If you’re a guy, order your normal size.
- If you’re a woman looking at a unisex style, go one size down. (A women’s 8 = a men’s 7.)
- If the boot name includes “Women’s”, it’s already sized for women—no need to adjust.
Women’s-specific Muck Boots are less bulky, often lighter, and designed for a better fit—which is a big plus if you don’t want to feel like you’re clomping around in oversized work boots.
Related:
If you’re planning your next hiking adventure, make sure your boots fit perfectly. Find out how hiking boots should fit in our detailed guide.
5. Calf Fit:
You want your Muck Boots to hug your calves just right—not so tight that they feel like compression socks, but not so loose that rain and cold air sneak in.
If your boots feel too tight around the calf, don’t force it—there are better options. Look for styles with gussets or zippers, which give you more wiggle room. And if your boots feel like they’re slipping at the heel when you walk, chances are the calf fit isn’t quite right..
Still feeling like your calves are fighting for space? A lower-cut Muck Boot might be the way to go. The lining will stretch a little over time, but don’t expect miracles—it won’t give you an extra size of room.
Related:
Ready to hit the slopes? First, make sure your snowboard boots fit perfectly. Check out our expert tips on how they should fit.
6. Instep Fit:
Getting your boots on and off shouldn’t feel like a full-body workout. If you’ve got a higher instep, though, you know the struggle—some boots just don’t cooperate.
Brands like Hunter and Barbour tend to be a little more forgiving, making it easier to slide your foot in and out. But some Muck Boots can be a bit snug, especially around the ankle. And let’s be real—if getting your boots on is a hassle, you’re probably not going to reach for them as often as you should.
If you’re constantly wrestling with your boots, it might be time to try a zippered Muck Boot. A model like the Apex Zip Ankle Boot lets you zip all the way down, so you can actually get your foot in without the usual ankle battle.
Related:
Fit matters when it comes to Blundstone boots. Discover how to make sure your Blundstones feel just right with our step-by-step fit guide.
7. Muck Boots’ Half Size Dillema
Muck Boots and half sizes don’t really mix, which can be frustrating. If you’re a solid 10 or 11, no problem. But if you’re a 10.5, you’ve got a decision to make—size up or size down.
Most people go up because, let’s be honest, you’ll probably be wearing thick socks most of the time anyway. But, if you size up and your feet are swimming in the boots, that’s a problem.
While most Muck Boots skip half sizes, a few models—like the Alpha Pursuit Ankle Boot and Chore Farm Leather Chelsea Boot—actually do come in them.
If your boots feel a little loose, grab an extra insole and stack it on top of the factory insole. This raises your foot slightly, reducing excess space and creating a snugger fit. It’s a simple trick, but it works wonders.
If the boot you want doesn’t come in a half size and/or it feels a little loose and you don’t want to return it, Muck has a simple fix: the Muck Boot Insole…
Just stack it on top of the factory insole (don’t take the original one out), and it’ll lift your foot just enough, reducing excess space and creating a snugger fit.
Related:
Not all boots are supposed to fit the same. Discover how to accurately size your Red Wing boots and avoid common sizing mistakes with our guide.
8. Muck Boot Widths:
Most Muck Boots come in a standard D width (medium). If you need extra room, sizing up is your best bet. Unfortunately, they don’t make designated wide-fit models, so going up a size and using thick socks is the easiest solution.
| Model | Fit |
|---|---|
| Chore Farm Leather Chelsea | Good if you need a wide fit. |
| Woody Max Realtree Edge | Medium width / full sizes only. |
| Chore Classic Steel Toe Wide Calf | Medium width / full sizes only. |
| Chore Farm Leather Chelsea Comp Toe | Medium & wide widths + half sizes |
| Arctic Pro Steel Toe | 15mm of wiggle room in the toes |
| Outscape Low | Available in half sizes |
| Comp Toe Wellie | medium width + half sizes |
These are the official unisex, men, women, kid, and baby Muck Boots size charts…
Muck Boots Size Chart
Muck Boots Size Chart (Unisex)
| Foot length (IN) | Foot Length (CM) | Unisex | US Men | US Women |
|---|---|---|---|---|
| 8.1" | 20.6 | 2 | 2 | 3 |
| 8.4" | 21.3 | 3 | 3 | 4 |
| 8.7" | 22.1 | 4 | 4 | 5 |
| 9" | 22.9 | 5 | 5 | 6 |
| 9.3" | 23.5 | 6 | 6 | 7 |
| 9.6" | 24.4 | 7 | 7 | 8 |
| 9.9" | 25.4 | 8 | 8 | 9 |
| 10.3" | 26 | 9 | 9 | 10 |
| 10.6" | 27 | 10 | 10 | 11 |
| 10.9" | 27.9 | 11 | 11 | 12 |
| 11.3" | 28.6 | 12 | 12 | 13 |
| 11.6" | 29.4 | 13 | 13 | 14 |
| 11.9" | 30.2 | 14 | 14 | 15 |
| 12.2" | 31 | 15 | 15 | 16 |
| 12.5" | 31.8 | 16 | 16 | 17 |
| 17 | 17 |
Related:
Looking at other options too? The LL Bean boot size chart might come in handy if you’re bouncing between brands—they run pretty different from Muck Boots.
Muck Boots Size Chart (Men)
| Foot length (IN) | Foot Length (CM) | US | UK | EUR |
|---|---|---|---|---|
| 8.1" | 20.6 | 2 | 1 | 33 |
| 8.3" | 21 | 2.5 | 1.5 | 33.5 |
| 8.4" | 21.3 | 3 | 2 | 34 |
| 8.6" | 21.8 | 3.5 | 2.5 | 35 |
| 8.7" | 22.1 | 4 | 3 | 35.5 |
| 8.9" | 22.6 | 4.5 | 3.5 | 36 |
| 9" | 22.9 | 5 | 4 | 37 |
| 9.2" | 23.3 | 5.5 | 4.5 | 37.5 |
| 9.3" | 23.5 | 6 | 5 | 38 |
| 9.5" | 24.1 | 6.5 | 5.5 | 39 |
| 9.6" | 24.4 | 7 | 6 | 39.5 |
| 9.8" | 24.8 | 7.5 | 6.5 | 40 |
| 9.9" | 25.4 | 8 | 7 | 41 |
| 10.1" | 25.7 | 8.5 | 7.5 | 41.5 |
| 10.3" | 26 | 9 | 8 | 42 |
| 10.4" | 26.7 | 9.5 | 8.5 | 42.5 |
| 10.6" | 27 | 10 | 9 | 43 |
| 10.8" | 27.3 | 10.5 | 9.5 | 43.5 |
| 10.9" | 27.9 | 11 | 10 | 44 |
| 11.1" | 28.3 | 11.5 | 10.5 | 44.5 |
| 11.3" | 28.6 | 12 | 11 | 46 |
| 11.4" | 29 | 12.5 | 11.5 | 46.5 |
| 11.6" | 29.4 | 13 | 12 | 47 |
| 11.8" | 30 | 13.5 | 12.5 | 48 |
| 11.9" | 30.2 | 14 | 13 | 49 |
| 12.1" | 30.7 | 14.5 | 13.5 | 49.5 |
| 12.2" | 31 | 15 | 14 | 50 |
| 12.4" | 31.5 | 15.5 | 14.5 | 50.5 |
| 12.5" | 31.8 | 16 | 15 | 51 |
| 12.7" | 32.3 | 16.5 | 15.5 | 51.5 |
| 12.8" | 32.5 | 17 | 16 | 52 |
| 12.9" | 32.8 | 17.5 | 16.5 | 52.5 |
Muck Boots Size Chart (Women)
| Foot length (IN) | Foot Length (CM) | US | UK | EUR |
|---|---|---|---|---|
| 8.2" | 20.8 | 4 | 2 | 35.5 |
| 8.4" | 21.3 | 4.5 | 2.5 | 36 |
| 8.5" | 21.6 | 5 | 3 | 37 |
| 8.8" | 22.2 | 5.5 | 3.5 | 37.5 |
| 8.9" | 22.5 | 6 | 4 | 38 |
| 9.1" | 23 | 6.5 | 4.5 | 39 |
| 9.3" | 23.5 | 7 | 5 | 39.5 |
| 9.4" | 23.8 | 7.5 | 5.5 | 40 |
| 9.5" | 24.1 | 8 | 6 | 41 |
| 9.7" | 24.6 | 8.5 | 6.5 | 41.5 |
| 9.9" | 25.1 | 9 | 7 | 42 |
| 10" | 25.4 | 9.5 | 7.5 | 42.5 |
| 10.2" | 25.9 | 10 | 8 | 43 |
| 10.3" | 26.2 | 10.5 | 8.5 | 44 |
| 10.5" | 26.7 | 11 | 9 | 44.5 |
| 10.7" | 27.1 | 11.5 | 9.5 | 45 |
| 10.9" | 27.6 | 12 | 10 | 46 |
Muck Boots Size Chart (Big Kids)
| Foot length (IN) | Foot Length (CM) | US | UK | EUR |
|---|---|---|---|---|
| 7.8" | 19.7 | 1 | 13 | 32 |
| 8.1" | 20.6 | 2 | 1 | 33 |
| 8.5" | 21.6 | 3 | 2 | 34 |
| 8.7" | 22.2 | 4 | 3 | 36 |
| 9.1" | 23.2 | 5 | 4 | 37 |
| 9.5" | 24.1 | 6 | 5 | 38 |
| 9.8" | 24.8 | 7 | 6 | 39 |
Muck Boots Size Chart (Little Kids)
| Foot length (IN) | Foot Length (CM) | US | UK | EUR |
|---|---|---|---|---|
| 5.7" | 14.6 | 8 | 7 | 24 |
| 6.1" | 15.6 | 9 | 8 | 25 |
| 6.5" | 16.5 | 10 | 9 | 27 |
| 6.7" | 17.1 | 11 | 10 | 28 |
| 7.1" | 18.1 | 12 | 11 | 30 |
| 7.5" | 19.1 | 13 | 12 | 31 |
Muck Boots Size Chart (Babies)
| Inches | CM | Size | Age |
|---|---|---|---|
| 3.5" | 8.9 | 1 | 0-3 Months |
| 3.8" | 9.5 | 2 | 3-6 Months |
| 4.2" | 10.5 | 3 | 6-9 Months |
| 4.5" | 11.4 | 4 | 9-12 Months |
How Muck Apex Mid Zip Boots Fit
The Apex runs a little big. Of course, if you’re a half size (like 10.5, 11.5, or 12.5), you’ll want to size down. For example, if you wear a 10.5, grab a 10, and it going to fit pretty close to perfect. Snug, but not uncomfortably tight. If you go with an 11, you’d be swimming in them.
How Muck Chore ST Fit
Again, if you’re a half size, you’re forced to choose between sizing up or down. If you’re a 10.5, go with a 10. It works, but I wish there was a half size because a little extra room would been nice.
How Muck Arctic Pro Fit
These boots just fit right. No need to size up like with some other Muck Boots, and I love that they don’t leave a bunch of extra space at the front. That means no weird sliding around when you walk, so you’re not out here feeling like you’re trekking in oversized clown shoes. If you want a work-boot feel with solid insulation and a snug fit, these are a winner.
Alright, let’s talk about measuring your feet the right way…
How to Measure Your Feet for Muck Boots
The Best Way?
If you really want the most accurate measurement, go to a store and let a fitting professional do it for you. These folks have seen every type of foot out there, and they know exactly what to look for—especially if you’re in between sizes.
But let’s be real. Not everyone has time to hit up a store just to measure their feet, which is why we’re going to walk through how to do it yourself…
Using a Brannock Device
You know that metal foot-measuring tool you see at shoe stores? That’s called a Brannock Device. If you have access to one, use it! Here’s how:
- Stand up—don’t sit down. You want to measure your feet while they’re bearing your full weight.
- Place your heel against the back of the Brannock Device (the little cup at the end).
- Look at the longest toe—it might not be your big toe! Read the number closest to it.
- Check your width by sliding the width bar until it lightly touches the side of your foot.
- Measure both feet! (Yes, your feet are probably slightly different sizes. Go with the larger one.)
If you don’t have a Brannock Device lying around (because let’s be honest, most people don’t), there’s a printable paper version you can find online. Just make sure you print it to scale so you don’t end up with a wrong measurement.
Measure at Home
If you don’t have a fancy measuring tool, don’t worry. All you need is a piece of paper, a pencil, and a ruler:
- Find a hard, flat surface (no carpets—those throw off the measurement).
- Wear the socks you’d normally wear with your boots. If you’re planning on using thick winter socks, measure with them on.
- Stand up and place your foot on a piece of paper. If possible, have someone else help you measure while you stand naturally.
- Trace around your foot with a pencil, keeping the pencil straight up (not tilted in or out).
- Measure from the longest toe to the back of your heel. That’s your foot length.
- Measure across the widest part of your foot. That’s your width.
- Repeat for the other foot and, again, go with the bigger size.
Things to Keep in Mind When Measuring Your Feet
Now that you’ve got your foot measurements, let’s go over a few important things to consider:
- Measure at the right time of day.
Your feet swell throughout the day, so measure them in the evening when they’re at their largest.
- Always measure both feet.
Most people have one foot slightly bigger than the other, and you don’t want to size your boots to the smaller one.
- Consider foot shape.
If you have high arches, wide feet, or a narrow heel, the way a boot fits might feel different, even if the size is technically right.
- Account for socks.
If you’re planning to wear thick socks with your Muck Boots, consider going up half a size (which usually means going up a full size since Muck Boots don’t come in half sizes).
- If in doubt, size up.
It’s easier to adjust the fit of a slightly bigger boot with insoles or thicker socks than to deal with one that’s too tight.
Muck Boot Sizing FAQ
Should you size up for Muck Boots?
Muck Boots only come in whole sizes, so if you’re a half size, you’ll have to decide whether to go up or down. The brand says their boots have a built-in 15mm toe allowance and that they’ll stretch a little over time.
For men who are a half size (like a 10.5), going up to the next size (11) is usually the better choice. Since Muck Boots are designed to be roomy and most people wear them with thick socks, a slightly larger size won’t feel too big.
For women who are a half size (like an 8.5), Muck Boots suggests going down to the next whole size (8). Women’s-specific models are already designed for a snugger fit, so this usually works out.
But, fit depends on the model. Some Muck Boots have a looser fit (like farm and outdoor styles), while others (like the Apex) fit closer to your foot. If you’re in between sizes and worried about too much extra room, an easy fix is to add an extra insole. This helps take up space and gives you a snugger fit without making the boot too tight.
Are Muck Boots supposed to fit loose?
Yes and no. Muck Boots are designed to have some extra room in the toe box, but that doesn’t mean they should feel sloppy or loose all over. The right fit should strike a balance—your toes should have space to move and expand when you walk, but your heel should stay secure to prevent slipping.
Here’s what to look for:
- A little wiggle room in the toes – You don’t want your toes jammed against the front, especially since your feet naturally expand throughout the day.
- A snug (but not tight) heel fit – Your heel should stay in place. If it lifts a lot when you walk, the boots are too big.
- No excessive slouching or creasing – If the boot is folding awkwardly around the ankle, it might be too big.
Muck Boots are made to be easy to slip on and off, so they naturally have a bit more space compared to lace-up boots. If they feel too roomy, try adding an extra insole or thicker socks to take up some of the excess space. But if they’re so loose that your foot slides around inside, you might need to go down a size.
Are Muck Boots easy to get on and off?
It depends on the model, but generally, yes—Muck Boots are designed to be easy to slip on and off.
Some styles, like the Muck Originals Mid, are made specifically for quick on-and-off wear. They have a mid-height design and a flexible neoprene lining that lets your foot slide in easily.
However, taller and snug-fitting models (like some Arctic and Chore boots) can be a little trickier, especially if you have a high instep.
If you struggle with getting them on, look for:
- Pull tabs or handles help you pull them on with less effort.
- Zippered versions like the Apex Zip allow you to fully unzip the boot, making them much easier to slip in and out of.
- Looser ankle fits – Some models have a wider opening, which makes them more convenient to step into.
Final Thoughts
Remember, Muck Boot sizing is a bit tricky and moist of their boots don’t come in half sizes, so knowing whether to size up or down is key. Pay attention to how your foot sits in the boot—especially at the ball of your foot and heel.
If you’re slipping around or feeling pinched, it’s a sign you need a different size. And don’t forget about socks! The thickness of your socks can completely change how your boots feel, so always try them on with what you’ll actually wear.
If you can, get professionally fitted in a store. But if you’re ordering online, take the time to measure your feet properly—whether with a Brannock device, a printable size chart, or a simple DIY method at home.
At the end of the day, Muck Boots should feel snug but not tight, roomy but not sloppy. The right fit means you’ll enjoy every step.