I wore this shirt for the first time in school today and over 30 people said something to me about it...

Mostly "How is that possible?" or "I don't get it".

A couple compliments though.

I'm a small in guy's shirts but they are kind of tight which is good but I was looking to buy a hoody and I don't know what size I am.

I was planning on buying a small but I don't know if it will be too small or maybe even too big because I don't buy non-zip up hoodies too often.

Any suggestions?