I bought myself a pair of snow shoes and have just been out on the hill to try them. When buying snow shoes you have to get the correct length, this is calculated on your weight, the heavier you are the bigger area shoes you need. Bigger area also means more expensive so I am lucky that I fall into the lightest category. There's quite an overlap in the sizing chart though from 54 to 91 kg you should use 25 inch shoes but from 77 to 114 kg you should use 30 inch. Quite a big uncertainty!