Vocaloid Hatsune Miku - Miku Wallet Keep those dollar bills and cards in one easy, attractive place with the Vocaloid Hatsune Miku Wallet! This light green wallet features the character from the singing synthesizer app Vocaloid in the act of singing with a yellow musical note for added decoration. Add to your Hatsune Miku collection in a useful way with the Vocaloid Hatsune Miku Wallet! Measures about 5-inches long x 3-inches wide. Ages 15 and up.