I always find it aggravating when people complain about the size of a garment without giving their body dimensions as their assessment of "too small" or "too big" is sort of worthless without them.

So let me start with mine - I'm 6'4, 195, 42 in chest, athletic build and I purchased an XL. I was looking for a lightweight, slimmer fitting jacket/hoodie. For me, this hoodie was right on point. It was thin, lightweight, and looks cool.  The XL fit me just like I wanted it to - trim, but not too tight. I was concerned about the length and that indeed is slightly short. Definitely wearable...but would have liked another inch or two on the length.

I typically wear L clothing so XL was a size up for me. I recommend you do the same. Keep in mind this is slim fitting so if you have a tummy this might not be the hoodie for you.