6CM x 3.5 CM What the heck... CM means Centemeters fool! Go back to school if you didn't know that. Didn't your mammy learn you nuthin? Here we have Speed Racer hanging from a keychain with the Speed Racer Enamel Keyring. This Speed Racer Enamel Keyring measures 6 Centimeters across and 3 1/2 CM across, featuring an very cool illustration of Speed hanging onto the wheel of the infamous Mach 5 as he spins to avoid Pops walking across the track again in a drunken stupor! Damn Pops!! Take the Speed Racer Enamel Keyring with you to keep track of the keys to your home, workplace, and your very own Mach 5. Yours might be cardboard, but you made it with your own bare hands. Match that, Pops!