what size cdr's should i use for ps2 games

what size cdr's should i use for ps2 games. is there any sites that tell you the size of ps2 game image files so i can buy the correct size disc in advance
in the mean time keep burning

ps2 games are either dvd's, or cd's, if they're cd's, you can copy them to a normal cd-r. if its a dvd, you cant copy it. well, you could copy it. but it would just be wayyyy cheaper to buy the original.. atleast for now.