Ski boots are sized in mondopoint — the length of your foot in centimeters. Enter your street shoe size to get a starting mondo size, then dial in last width and flex, or read the full ski boot size chart below.
Measure your foot in centimeters — that number is your ski boot size. Most skiers end up 1 to 1.5 sizes below their street shoe size: a US men's 9 is roughly a 27.0 mondo, a US women's 8 is roughly a 25.0. The boot should feel snug with your toes brushing the liner when you stand up straight, and pulling back when you flex forward.
Mondopoint
30.0
Try 29.5 and 30.0 — a shell fit decides it.
Flex
85–100
Enough support for faster groomer skiing while still forgiving in bumps and trees.
Last width
99–100 mm
Medium volume. The most common performance fit. Works for the majority of skiers.
This is a starting point, not a fitting. Shell size, instep height, and calf shape all move the answer — get a shell fit with a bootfitter before you commit.
Mondopoint is your foot length in centimeters. Youth rows cover junior boots. Brands vary by about half a size — confirm with a shell fit.
| Mondo (cm) | US men's | US women's | UK | EU |
|---|---|---|---|---|
| 15.5Youth | 8C | 8C | 7.5 | 24 |
| 16.0Youth | 9C | 9C | 8 | 25 |
| 16.5Youth | 10C | 10C | 9 | 26 |
| 17.0Youth | 10.5C | 10.5C | 9.5 | 27 |
| 17.5Youth | 11C | 11C | 10 | 28 |
| 18.0Youth | 12C | 12C | 11 | 29 |
| 18.5Youth | 13C | 13C | 12 | 30 |
| 19.0Youth | 1Y | 1Y | 13 | 31 |
| 19.5Youth | 1.5Y | 1.5Y | 1 | 32 |
| 20.0Youth | 2Y | 2Y | 1.5 | 33 |
| 20.5Youth | 3Y | 3Y | 2 | 34 |
| 21.0Youth | 3.5Y | 3.5Y | 2.5 | 34.5 |
| 21.5Youth | 4Y | 4.5 | 3 | 35 |
| 22.0 | 4 | 5 | 3.5 | 35.5 |
| 22.5 | 4.5 | 5.5 | 4 | 36 |
| 23.0 | 5 | 6 | 4.5 | 36.5 |
| 23.5 | 5.5 | 6.5 | 5 | 37 |
| 24.0 | 6 | 7 | 5.5 | 37.5 |
| 24.5 | 6.5 | 7.5 | 6 | 38.5 |
| 25.0 | 7 | 8 | 6.5 | 39 |
| 25.5 | 7.5 | 8.5 | 7 | 39.5 |
| 26.0 | 8 | 9 | 7.5 | 40 |
| 26.5 | 8.5 | 9.5 | 8 | 41 |
| 27.0 | 9 | 10 | 8.5 | 42 |
| 27.5 | 9.5 | 10.5 | 9 | 42.5 |
| 28.0 | 10 | 11 | 9.5 | 43 |
| 28.5 | 10.5 | 11.5 | 10 | 44 |
| 29.0 | 11 | 12 | 10.5 | 44.5 |
| 29.5 | 11.5 | 12.5 | 11 | 45 |
| 30.0 | 12 | 13 | 11.5 | 46 |
| 30.5 | 12.5 | — | 12 | 46.5 |
| 31.0 | 13 | — | 12.5 | 47 |
| 31.5 | 13.5 | — | 13 | 48 |
| 32.0 | 14 | — | 13.5 | 48.5 |
Need just the numbers? Open the full mondo size conversion chart.
The number printed on the heel of your boot — something like 305 mm — is boot sole length, the outside length of the shell. Bindings are adjusted to BSL, not mondo, and two boots in the same mondo size can have different sole lengths. Use mondo to buy boots and BSL to set up bindings; the DIN calculator asks for BSL for exactly this reason.
No. Ski boots use mondopoint, which is the length of your foot in centimeters. Most people wear a ski boot 1 to 1.5 mondo sizes smaller than the shoe size they expect, because ski boots are meant to fit snug with no dead space.
Usually not. Toes brushing the front of the liner when you stand upright is normal. When you flex forward into the boot your foot slides back and the toes pull away. If your toes are crushed when flexed, the shell is too short.
Last is the width of the boot at the widest part of the forefoot, measured in millimeters. 97-98mm is a narrow race fit, 99-100mm is a medium performance fit, and 101-104mm is a comfort fit for wide feet.
Stand on a piece of paper against a wall with a sock on, mark the longest toe, and measure heel to mark in centimeters. That number is your mondopoint. Measure both feet and use the larger one.
Know your size? Run the boot finder to get specific boot models that match your foot shape and skiing style.
Once your sizing is sorted, these are the inexpensive pieces that make the biggest difference on the hill.
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Dry liners between ski days
A forced-air dryer helps dry damp boot liners and gloves after a wet opening day, ready for your next morning on snow.
Before you buy: Follow your boot maker’s drying instructions; avoid excessive heat and check the dryer’s voltage before buying.
Check options on AmazonA closer boot fit
A thin ski-specific sock reduces bulk in a snug boot. An over-the-calf cuff keeps the sock edge above the boot cuff.
Before you buy: Choose the right size and cushioning for your boot fit; thicker socks are not a fix for loose boots.
Check options on AmazonChanging early-season light
Start with a lens suited to the light you ski most. A low-light option can help on cloudy opening days and in flat light.
Before you buy: Lens packages vary. Check what is included and try the goggles with your helmet to confirm the fit.
Check options on Amazon