Detachable Keychain Wallet: The dimensions of the coin purses are 4.4” W x 3.15” H for the square shape and 4.5” W x 3.35” H for the semicircular shape, the wrist strap measures 8.07 inches in length. The detachable design ensures you can use it as a coin purse, or put in your pocket, or hang on your waist. Zip Around Keychain Wristlet Wallets Small Portable Dual Pounch Wristlet Detachable Coin Purse Travel , Summer , Coinpurse ,Vacation , Lightweight , Casual , Preppy