This is a smart key case made of genuine leather (vegetable-tanned leather). The vibrant red color and the contrast with the natural leather interior are stylish. It's designed to hold both a smart key and regular keys together, allowing you to carry all your keys compactly in one case. Material: Vegetable-tanned leather (enjoy the aging process) Color: Red (exterior) / Natural (interior) Features: Holds one smart key and three (or four) keys. Handmade, with the warmth of hand-stitching. Securely closes with a snap, so you don't have to worry about keys falling out. Size when closed: Height: Approximately 5cm Width: Approximately 11cm Thickness: Approximately 3cm The smart key in the photo is: Height: Approximately 3.7cm Width: Approximately 7cm Thickness: Approximately 1.2cm Please experience the appeal of vegetable-tanned leather, which becomes more familiar to your hand and gains character the more you use it.