First time ordering clothes from THELEESSHOP.
This shirt fits like a glove.
I like my shirts to fit so they fitted to conform to my body but not to tight.
I would say I have a medium athletic build, not very muscular but toned.
If you are the same height and weight but very muscular or prefer looser fit clothing I would recommend going up a size.
The measurement guide for each item is pretty spot on in my opinion.