KEY Heroes
Aug 17th 2026 | KEY Apparel
If you're ordering overalls online, especially for the first time, you're probably looking for a straightforward answer on overalls sizing, or an overalls size chart you can compare your own measurements against.
Finding your size in overalls can be tricky, but this guide covers what you need to pick the right size the first time and skip the hassle of ordering multiple sizes and sending some back.
Looking for your next pair of overalls? Shop women's overalls, men's overalls and coveralls, and kids' bib overalls and coveralls today.
How to Size Overalls
How you size overalls depends on whether you're shopping for men's overalls or women's overalls, since KEY sizes those two differently.
Sizing Women's Overalls
Overalls generally run larger than regular clothes. That's intentional. You'll usually wear your regular clothes underneath, so the fit needs extra room to accommodate whatever layers you already have on.
Manufacturers also measure overalls differently from one brand to the next, so the most reliable approach is knowing your own measurements rather than relying on your usual clothing size. Use a soft tape measure to get your bust, waist, hips, and inseam, as shown in the diagram below.
Once you have those numbers, check them against an overall size chart. Here's an example of a KEY size chart for women's overalls.
If you fall between sizes, size up so the fit stays comfortable over your regular clothes. At KEY, our women's overalls come in short, regular, and tall lengths, so your inseam measurement matters as much as your other numbers.
Our measurements run to the outer edges and already build in extra room for layering underneath. Keep in mind there's a real difference between sizing for denim overalls and insulated overalls: denim overalls use standard clothing sizes, while insulated bibs run small, medium, large, and so on, which is one more reason exact measurements matter more than guessing from your usual size.
Sizing Men's Overalls (Insulated Bibs)
Sizing men's overalls works much the same way. You're looking for a size larger than your usual fit so the overalls sit comfortably over what you're already wearing.
Measure your chest, waist, and inseam with a flexible tape measure, as shown below.
We recommend taking your measurements over the underclothes you'd normally wear. When you measure your waist, bend side to side to find your natural curve and measure across the widest point there. A common mistake is assuming your pants waist size carries over to bibs. Bibs sit around the belly, so the number you need is usually larger than your regular pants waist size.
For inseam, measure the inside of your leg, or use a pair of pants you already own as a reference.
Once you have your numbers, check them against a bib overalls size chart, which is standard on most sites selling men's overalls.
If you run short or tall, look for a length option. KEY men's overalls come in short, regular, tall, and extra tall. As with women's sizing, size up if you land between two sizes, and know that our measurements already include room for layering.
Sizing Men's Denim Overalls
Men's denim overalls at KEY use a different sizing method than insulated bibs. Instead of small, medium, or large, denim overalls are sized numerically, the same way jeans are, as shown in the chart below.
A men's overall size chart for denim styles gives you a precise fit. If you fall between two sizes, size up rather than down, but order the size that matches your usual pant inseam.
Shrinkage After Washing Overalls
If sizing bib overalls or denim overalls correctly the first time has you worried about what happens after the first wash, KEY already accounts for that. Shrinkage is minor, and we build it into our measurements from the start. As long as you follow the care label, your overalls will hold their size wash after wash.
Ready to Get the Right Overalls Fit
Getting your size right the first time means less guesswork and fewer returns, whether you're ordering insulated bibs for winter or a pair of denim overalls for everyday wear. Take your measurements, check them against the right chart for your style, and size up if you land in between.
Found your fit? Shop KEY denim overalls now and save 20% during the Denim Days Sale, running through August 31.
Frequently Asked Questions
How do I find my size in overalls?
Overalls sizing starts with your own measurements rather than your usual clothing size, since manufacturers sizes overalls differently from brand to brand. Measure your bust or chest, waist, hips (for women's styles), and inseam with a soft tape measure, then compare those numbers to the size chart for the specific style you're ordering. KEY builds extra room into every measurement to account for the layers you'll wear underneath, so a snug fit on the chart still leaves space to move.
What's the difference between a bib overalls size chart and a denim overalls size chart?
A bib overalls size chart runs on small, medium, large, and similar sizing, the same way most insulated outerwear does. A men's overall size chart for denim styles works differently, using numeric sizing the same way jeans do, since denim overalls are cut and sized closer to standard pants. Knowing which chart applies to the style you want prevents ordering the wrong size based on a different overall type.
Do overalls run bigger than my regular pants or jeans?
Overalls are built to run larger than your everyday clothing size, and that's intentional rather than a fit inconsistency. The extra room accounts for whatever you're already wearing underneath, whether that's a t-shirt in summer or a base layer in cold weather. This is also why your waist measurement for bibs typically comes in larger than your regular pants size, since the waistband sits higher and needs to clear your belly comfortably.
What if my measurements fall between two sizes on a size chart?
Size up rather than down whenever your measurements land between two sizes. A slightly looser fit still moves comfortably over layers and stays functional on the job, while sizing down risks a fit that's too restrictive to work in. This applies whether you're checking a bib overalls size chart or a denim numeric chart, the sizing logic stays the same either way.
Will sizing bib overalls correctly still leave room for shrinkage after washing?
Yes, and KEY already accounts for minor shrinkage in the original measurements listed on every size chart. As long as overalls are washed according to the care label, the fit you size into on day one is the fit you'll still have after repeated washes. This is one less variable to worry about when sizing bib overalls or denim styles for the first time.
Do men's and women's overalls use the same size chart?
No, men's and women's overalls use separate size charts, and men's styles split further between insulated bibs and denim. Women's charts are based on bust, waist, hip, and inseam measurements, while men's charts split between small-medium-large sizing for insulated bibs and numeric waist-and-inseam sizing for denim. Checking the right chart for both gender and style is the fastest way to avoid an exchange.