>>1832730>>1832755If the pre-made ones fit, they're fine.
My first framebag was some Revelate bag in 2012 (?), the largest size they offered, but itdidn't fit my 63cm frame well.
I put up with it for a while, but learned how to make my own that fit better (less swaying), and use more of the ample space. This is what a tall man's half frame bag looks like (doesn't interfere with two bottle cages).