I got a binder today and while it does get me flatter my chest is not ruler flat...and its driving me crazy. Do your guys binders leave a small hump on the chest? Not a big one but a small one? Or is it flat as a ruler?

nah it doesnt get all the way flat, but the only cis guys who are ruler flat are super skinny and gross

Mine's nowhere near 'flat' but mens aren't either.   Unless you want to look 10, you're better off with a little hump

Yeah, what Elijah said only really skinny guys have board flat chests.