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Plastic Boot Sizing Science!

What everybody should know about plastic boots!!!

The first thing to understand is that plastic boots consist of two different components and this will affect the way they should be fitted: 

  • The plastic shell

  • The liner

The shell will retain its shape and rigidity  throughout the life of the boot. Since the shell is made from a mold, the majority of companies will only make one shell per size, without half sizes. For example, the Scarpa Denali 7.5 and 8 US have the same shell size.

Although half sizes are available in all plastic boots, it is usually only a difference in  thickness of the liner's insole that will determine between a half size and the next full size. In other words, a thicker insole will take up volume to make the half size difference. If we take our Denali example again, the size 7.5 will have a slightly thicker insole than the size 8.

What this all means  is that, its much more important to make sure the shell is the appropriate size rather than the liner, since you can always play with different insoles thickness to accommodate a slightly smaller foot...

On the other hand, the liner will usually "pack out" in the first couple of week of usage. 

When sizing plastic boots, make sure you don't choose a size that is already too big for you. Usually, the liners are warm enough that you won't need an extra pair of socks. Furthermore, the liner reduces the friction between the shell and your foot in the same manner an extra pair of socks would. Nevertheless,  if you do want your boots to accommodate extra socks or swollen feet (high altitude), be aware that after the liner packs out, your boots will feel approximately  half a size to a  full  size bigger than when you purchased them .

Boot sizing in three steps:

1. To help pin-point your boot size as precisely as possible, here's a few tips:

  • Stand up on a sheet of paper and trace the contour of your feet. After this is done take the length and width measurements of this beautiful master piece. (make sure you measure both feet, they might not be the exactly same!) 

  • At this point, you can either fax us this information along with your name, phone number and the boot you are planning to purchase. Or  e-mail or call us with the information. On our end, we will match your specifications to the boots insole.

2. Once you receive your boots, make sure their size and shape match your feet:

  • Stand up and try both boots, lace them and/ or buckle them up. When  standing up with your legs straight, your toes should brush the front of the liner. When you flex your ankles forward, you shouldn't feel the front anymore. The evening is the best time to try your new boots as your feet  are usually a little swollen from standing all day...

  • Make sure you are comfortable in the liner and that your foot is neither compressed or "floating" in it. You can remove the liner from the shell and check for extra room between your foot and the front or the sides of the liner. Always stand up when fitting boots.   

  • Check shell size. This will give you extra hints to make sure  the size is correct . First, remove the liner. Put your foot directly in the shell. Make sure your toes are brushing the front of the shell. Flex your foot forward a bit. You should have an inch (two fingers one on top of each other) between your heel and the back of the shell.

  • Check for any pressure points.

  • Now you are assured of a good fit even after the liner packs out. 

3.What if you are still not sure?

  • Simple: contact us! Our staff is knowledgeable and always ready to help.

The Mondo Sizing System

The Mondo sizing system refers to the boot sole length in centimeters. Mondo sizes vary from one company to the other, sometimes from one model to the other. This is due to the fact that the boot sole length does not always translate to the same inner boot and liner volume. 

The system is the same for men and women's sizes. The chart below will help you find your approximate Mondo size.

 

English Men US Lady US French Mondo Point
2.0  2.5 3.5 34.5  
2.5 3.0 4.0 35.0 22.0
3.0 3.5 4.5 35.5 22.5
3.5 4.0 5.0 36.0 23.0
4.0 4.5 5.5 37.0 23.5
4.5 5.0 6.0 37.5 24.0
5.0 5.5 6.5 38.0 24.5
5.5 6.0 7.0 38.5 25.0
6.0 6.5 7.5 39.5 25.5
6.5 7.0 8.0 40.0 X
7.0 7.5 8.5 41.0 26.0
7.5 8.0 9.0 41.5 26.5
8.0 8.5 9.5 42.0 27.0
8.5 9.0 10.0 42.5 27.5
9.0 9.5 10.5 43.0 28.0
9.5 10.0   44.0 28.5
10.0 10.5   44.5 X
10.5 11.0   45.5 29.0
11.0 11.5   46.0 29.5
11.5 12.0   46.5 30.0
12.0 12.5   47.0 30.5
12.5 13.0   47.5 31.0
13.0 13.5   48.0 31.5
13.5 14.0   49.0  
14.0 14.5      
English Men US Lady US French Mondo Point
 

Contact us for more help:

  • Fax: (403) 762-4672

  • e-mail us

  • Toll Free Phone: 1-800-661-0399 (Canada an USA)

  • Phone International: (403) 762-2591

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Last modified: October 2003. webmaster@mountainmagic.com

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