I read the reviews so I ordered a medium since I have small wrists. It is too tight and I have small wrists. I don't think this is for adults.

I bought many wrist wallets... The type that have Velcro which is what I've been using. I am a Pro-Trainer & I use them a lot because i am very active, energetic & illustrative. Because of that, me having a reg wallet is annoying, so I just put my cash in it (placed just like a real wallet) & a few of my business cards inside & get to work! Looks really cool & sporty too! These caught my eye cause of all the different colors but the picture really doesn't give you much of an example so you can see what they have to offer ahead of time. So when I got them I couldn't put money inside it like I did with the others I've purchased (like a reg wallet) cause it won't fit @ all. Only way to put any cash inside it is to fold it a few times. Also the other wrist wallets I use aren't that sweat material like these are so theres not much you can put in here except maybe a single key & a couple of folded dollars thats if you dont mind that the money will get all damp cause it's all sweat material unlike the others I buy. This item is sporty looking but I can't see any use @ all cause a credit card can't fit in it, only a few dollars can fit but only if you fold it which will get all damp. No use as a wrist wallet... Just a sweat band! I wish i wouldve returned it before i wore one for a day. Oh well, my loss. Shipping was as promised though.