get MAGNUMS they are bigger than most condoms, but most people do not use condoms correctly PERIOD
heres what u should do
lube ur dick up real good with ASTROGLIDE before you put the condom on....then take the condom and STRETCH the ring at the base so it doesnt suffoctae your cock and you go 1/2 hard like most guys....then put it on...then LUBE the condom thats on your dick again with ASTROGLIDE.. and keep it by the bed so if the condom or the girl starts drying up u can apply more.
youd be amazed how much better it feels if you do it this way.