The short answer
- Leg opening is the width of the hem. A spec quoted flat is half the number quoted around: 8" flat is 16" around.
- What matters most is the opening compared with the knee: narrower than the knee tapers, wider than the knee flares.
- Narrow openings (about 12–14" around on a men's 32 waist) hug the ankle and can stack; wide ones (18" and up) fall over shoes and need more length.
- Measure the hem of a pair you like, double it, and you have a number you can reuse.
Two pairs can have the same waist, thigh and inseam and still look nothing alike from the knee down. The difference is the leg opening: the width of the hem. It's the number that decides whether jeans skim a sneaker, sit over a boot or swallow a shoe, and it's the one most product pages bury at the bottom of a size chart.
Flat or around: the first thing to check
Brands quote leg opening in two ways, and mixing them up is the most common mistake. A flat measurement is taken across the hem with the leg laid flat, front on top of back. An around measurement is the full circumference, so it's double the flat number. If a chart says "leg opening 8" with no other clue, it's almost certainly flat, because no adult jeans have an 8-inch circumference hem.
All the figures on this page are around, measured on the finished jeans. To compare with a pair you own, lay the leg flat, measure straight across the hem and double it, exactly as the measuring guide shows.
The openings by fit
These are the typical finished measurements for our fits, on a 32" men's waist and a 28" women's waist. Every pair is cut from your own numbers, so yours scale with you; the table shows how the fits differ.
| Fit | Knee (around) | Leg opening (around) | Same opening flat | Knee to hem |
|---|---|---|---|---|
| Men's skinny | 14" | 12.5" | 6.25" | Narrows 1.5" |
| Men's slim | 15.5" | 14" | 7" | Narrows 1.5" |
| Men's straight | 17" | 16" | 8" | Almost straight |
| Men's relaxed | 18.5" | 17.5" | 8.75" | Almost straight |
| Men's athletic taper | 16" | 13.5" | 6.75" | Narrows 2.5" |
| Men's bootcut | 16.5" | 18.5" | 9.25" | Opens 2" |
| Women's skinny | 12.5" | 10.5" | 5.25" | Narrows 2" |
| Women's straight | 15" | 15" | 7.5" | Straight |
| Women's bootcut | 14.5" | 18.5" | 9.25" | Opens 4" |
| Women's flare | 14" | 22" | 11" | Opens 8" |
| Women's wide leg | 22" | 24" | 12" | Wide all the way |
| Mom | 16" | 13.5" | 6.75" | Narrows 2.5" |
| Barrel | 24" | 14.5" | 7.25" | Curves in 9.5" |
Finished garment, measured around. Men's figures at a 32" waist, women's at 28".
The knee-to-hem rule
The opening on its own tells you less than you'd think. A 14" hem looks slim on a leg with a 15.5" knee and dramatic on a barrel with a 24" knee. Read the two numbers together:
- Opening 1–3" narrower than the knee: a taper. Clean over sneakers, shows the ankle, can stack neatly.
- Within an inch of the knee: a straight leg. The most forgiving with every kind of shoe.
- 2–4" wider than the knee: a bootcut. Just enough room to sit over a boot shaft.
- 6" or more wider: a flare. A statement, and it needs the right length to work.
How the opening changes length and shoes
A narrow opening can carry extra length as a soft stack, because the hem catches on the ankle. A wide opening can't: extra length just slides down and drags. That's why flares and wide legs are hemmed for a specific shoe, and why tapered legs look best with little or no break. The full length-by-shoe guide is in how long should jeans be, and the shoe-by-leg matrix in what shoes to wear with jeans.
| Opening (around) | Works with | Watch out for |
|---|---|---|
| Under 13" | Low sneakers, loafers, slim shoes | Chunky shoes look oversized; getting the jeans on over a wide foot |
| 13–16" | Almost everything | Stacking on the wider end: a slight break is cleaner |
| 16–19" | Boots, chunkier sneakers | Too long in flat shoes and the hem drags |
| 20" and up | Heels, platforms, boots | Needs a precise length for one shoe height |
Style guidance, not rules. The bands are for adult jeans.
When not to chase a narrower opening
- Big calves or strong thighs: a very narrow hem on a full leg pulls the knee and calf tight. Keep the opening in proportion, or start from jeans for athletic thighs.
- Rigid denim: a narrow hem with no stretch can be hard to get over the heel.
- Boots you'll actually wear: measure the boot shaft before choosing a slim leg.
Giving us your number
Leg opening is one of the optional measurements on every Jeanszilla order. If you have a pair whose hem you love, measure it flat, double it and enter it, or describe what you want in the notes for your tailor ("a little narrower at the ankle than my old straight pair"). A pattern maker checks your numbers within 1 working day and emails you before cutting if anything looks unusual for the fit you chose.
Or browse women's fits.
Questions
Is leg opening measured flat or around?
Both are used. Flat is across the hem with the leg laid flat; around is the full circumference, which is double. If a chart shows a number under about 10" for adult jeans, it's flat.
What is a normal leg opening for men's jeans?
On our fits at a 32" waist it runs from 12.5" around for skinny to 18.5" for bootcut, with straight at 16".
Does leg opening change with waist size?
Usually, yes. Graded store sizes widen the hem as the waist goes up, and a pair cut to your measurements scales the whole leg to you.
Can a tailor change the leg opening?
A tailor can usually narrow a hem by tapering the lower leg. Widening it is rarely possible, because there's little spare fabric in the seams.
How do I measure the leg opening of my jeans?
Lay the leg flat with the hem smooth, measure straight across from fold to fold, and double the number.
