They are very small. I first bought Big Boys M for my skinny 8 year old. They didn't even fit on his thighs. Instead, they suit his little 6-year-old brother. Then I ordered the big ones, which are said to be suitable for 11-13 year olds. They were too tight too! I just ordered a very large one and am crossing my fingers that they fit better. My 6 year old son is very happy with his jammers! Hurry to order, they are incredibly small!
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