-- Posted by athleticcup at 8:29 am on Dec. 21, 2008 my gym teacher say that i need a jockstrap and cup for gym. we are only allowed to wear that under our shorts. any ideas on what size cup and jock? and also, what brand? my dick is 6.5 - 7 inches -- Posted by trinity fosho at 8:30 am on Dec. 21, 2008 Sorry don't know the size of your penis. -- Posted by sweetness9292 at 8:31 am on Dec. 21, 2008 well my dear, that depends on the size of your penis. -- Posted by Miss Vanity at 8:32 am on Dec. 21, 2008 I don't know the size of your penis. -- Posted by babecakes at 8:33 am on Dec. 21, 2008 what size are youuu.... -- Posted by Tubbz at 8:34 am on Dec. 21, 2008 you'll definitely need an XS.   -- Posted by noraa at 12:08 pm on Dec. 21, 2008 Go to the jockstrap store or wherever you go and see what looks like would fit. -- Posted by MatthewBonner90 at 2:57 pm on Dec. 22, 2008 Uhm, i wear jockstraps all the time for gym class and for sports after school. The size jock you wear has nothing to do with your penis size. The jock size is your waist size. You don't want it to be too loose, better to be a bit tight.