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Sizing guides
A chart tells you a range. These guides explain what moves you up or down inside it, with worked examples, the mistakes we see most, and the sources for every number.
Snow
How to choose ski lengthHeight, ability, terrain and weight, with worked examples
Snowboard size guideLength, waist width and boot size
Ski boot fitMondopoint, shell size, last width and flex
Measure your foot for bootsA home method for ski and snowboard boots
Cross-country ski lengthClassic versus skate, weight versus height
Ski pole lengthAlpine, classic and skate methods compared
Bikes
Find your bike frame sizeHeight, inseam, standover, reach and stack
Kids bike sizeWheel size by age and inseam
Bike helmet fitMeasure, adjust, and know when to replace
Baseball and water sports
Baseball and softball bat sizeLength, weight, drop and league certification
Baseball glove sizeBy position and age, and breaking in
Wetsuit sizing and fitReading a size chart and checking fit in the water
How the guides are written
Each guide names the source next to the claim it supports and lists every source at the bottom. When makers disagree, the guide says so. Read the editorial policy for how sources are chosen and how corrections are handled.