Unique Novelty Hand Cuffs and Police Car Knives Set. When the police car knife is closed it measures approximately 4 1/2 inches long, X 1 1.2 inches high. When open, with exposed blade, the approximate measurements is 8 1/4 inches long. The hand cuffs, when closed measures approximately 3 1/2 inches long X 1 1/4 inches high, and with the blade open the cuffs measures approximately 8 1/4 inches long. Note there is a belt clip on the handcuff knife.