For sure penis size affects the choice of a condom. actually regular condoms always give me a problem: when i try to wear them they don't slide around my penis, so i have to force them, by pulling them (say like a sock ). when it's on, i loose my erection. Does it depend on my penis size? it's 9 in long (alongside, 8 on top because it's curved) and 6.3 around. Does this measurements (obviously, girth afffects this thing much more than lenght) justify the choice of a bigger condom, or are my problems with them due to a different reason? in other words: am i really too thick for a regular condom? Thank you. PS: do not advice me American brands of condoms, because i live in Italy!