sizing on Retro apparel?

[Possegal]

I had my eye on the Chat Noir Jersey but read somewhere that they run small so the XL wouldn't work for me. Don't remember where I got this info.

I believe the retro image apparel site says that this shirt runs small so to size up. I've bought one jersey from them, but wanted the chat noir one but then that comment kept me from buying it. I do like the jersey I did buy though.