Boot Shell Sizes & Boot Fitting Tips

We have dozens of ski boot fitting articles, check them out!

There are quite a few boot sizing charts floating around the web. Here are a few to get you started. Main purpose of this is to help you decide on a shell size when you’re “between sizes,” by knowing at what size point the shell gets smaller. This is especially useful when mail ordering boots (though we recommend buying boots from a retailer with boot fitting services.) When it comes to rating boots as being “wide” or “narrow,” we defer to BootFitters.com

Black Diamond boot sizes.

Black Diamond boot sizes.

Dynafit boot sizing

Dynafit boot sizing. Click to enlarge.

Garmont boot sizing.

Garmont boot sizing. Click to enlarge.

Sidebar, with help from Paul Parker: When comparing boot shell weights, do so by discerning what shell actually fits your foot, rather than looking at BSL (Boot Sole Length) numbers.

All boot shells have a number stamped inside the lower shell (scafo in Italian) such as “28.5.” This number is the boot’s Mondo Point Size. Shell cuffs and tongues often span two lower shell sizes so they may not reflect the exact size — it is important to look inside the scafo. That number in the scafo in virtually all cases will be the length of the inside of a complete boot. This is the number you need to compare one boot shell to another in terms of what will fit your foot. For example, if you fit a 28.5 scaffo in one brand, you’ll likely find that the same Mondo fits you in another brand.

The BSL, or BOOT SOLE LENGTH, is printed on the outside of the boot and is often mistaken for size. Most manufacturers also put a sticker on the outside of the boot that shows actual MPS size.

Scott ski touring and ski mountaineering boots 2014-1015, along with Cosmos includes various models For boot fitting, here are the Scott shell breaks. This won’t change much going forward so is probably fine for 2015-2017.

Celeste, Nova and other women’s backcountry skiing boots:
23.0-23.5, 24.0-24.5, 25.0-25.5, 26.0-26.5, 27.0-27.5

Cosmos, Orbit and other men’s boots:
25.0-25.5, 26.0-26.5, 27.0-27.5. 28.0-28.5, 29.0-29.0, 30.0-30.5, 31.0-31.5

  Your Comments

  • Lindahl: While shaving 1lb off battery weight is great, that still makes for a 6.1lb...
  • Max: Hi Lou, this issue caught my eye since I purchased a pair of 26.0 Khion MS ...
  • Lou Dawson 2: Hah! The gauntlet is down. Should be easy, I'll get on it. https://www.y...
  • Crazy Horse: I'm not impressed. -- Until you hack an adapter to power an espresso machi...
  • Lou Dawson 2: Hi Harpo, I can tell you that when we tested the Mammut packs, the light fa...
  • Lou Dawson 2: VT, great minds think alike. Stay tuned. Lou...
  • VT skier: Lou, Here is a link to some weights and prices for smaller LiPos used in ...
  • Harpo: I wanted a longterm review of the Light Removable including how the light w...
  • Lou Dawson 2: Got a better scale for larger weights, weight of Voltair 30 liter unfortuna...
  • Lou Dawson 2: Hi Harpo, we're working on a lot of things, not sure exactly when that will...
  • Tyler Eardley: I'm 99% sure this is the boot of choice for splitboarders. I'm taking the p...
  • harpo: Hi Wildsnow, I think you indicated in the comments that you would be doing ...
  • Eric B: I agree with the "one deploy" philosophy. If you ever had to use one of th...
  • Lou Dawson 2: Finn, my understanding from our extensive comment threads is that there are...
  • Lou Dawson 2: Hi See, I didn't feel like you were detracting from anything, but thanks fo...
  • See: I am in no way trying to detract from your project here, Lou. I’m totally i...
  • finn: Ok, after reading all of this, what is the opinion of the safest tech bindi...
  • Stewart: Seems just another example of technological fetishism and consumerism unhin...
  • Lou Dawson 2: I found what's possibly a better, lighter weight converter, ordered it. ...
  • Lou Dawson 2: See, good points. My UsbAir wiring harness indeed weighs less than yet anot...
  • Jeremy C: I doubt a USB feed off your avalanche airbag, is something that any manufac...
  • See: Great fun, but a 9000 mAh usb charger weighs less than 8 ounces, can be kep...
  • Lou Dawson 2: Drew, I actually do agree with you, I think the "one deploy" model is way b...
  • Lou Dawson 2: It's a Galaxy Note 1, been in use for about 18 months with the same battery...
  • Buck: "Speaking of the Galaxy Note, it’s got a massive aftermarket battery on it....
  • Drew Tabke: The philosophy behind the multiple-deploy design principle is madness. If y...
  • Lou Dawson 2: I don't see why not. It would run your tablet as well. It's basically a hig...
  • Billy: Can you charge your galaxy with that contraption while flying on a commerci...
  • Lou Dawson 2: Thanks Andrew, I was hoping someone who knew something would chime in and h...
  • Dan: Lou, you are sick...brilliant, but sick....

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Welcome to Louis (Lou) Dawson's backcountry skiing information & opinion website. Lou's passion for the past 50 years has been alpinism, climbing, mountaineering and skiing -- along with all manner of outdoor recreation. He has authored numerous books and articles about ski touring and is well known as the first person to ski down all 54 of Colorado's 14,000-foot peaks, otherwise known as the Fourteeners! Books and free ski touring news and information here.

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