We have XL and it seems more than L or Medium to me so they run small. I think the shirt is awful (wolf in techno color, there's something going on) but my 12 year old thinks it's "cool" so here it is. Looks like polyester but I haven't checked the label. In general I'm not a fan but my kid is like that so it gets five stars since I don't wear it and that gives him a chance to express his uniqueness.
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