Ordered a M, received a L :( Received #4, which is awesome, as that was on my wishlist,

Ordered a M, received a L :( Received #4, which is awesome, as that was on my wishlist, actually? But, the sizing... May or may not be okay, I'm not sure. But I'll wait for Customer Support to get back to me before opening the pack, as it's doubtful I'd be able to repackage it up as nicely, if I have to return it or something.