This is a Micro 5-size system notebook made with bridle leather and Tuscan leather. 126mm (height) x 182mm (width) Ring inner diameter: 15mm With a simple design, the 15mm inner diameter ring can hold over 100 refill sheets. Bridle leather is attractive because it gains luster and depth with use. Tuscan leather is used for the ring guard. *Please note that minor scratches and scuffs, which are inherent to the leather, are to be expected. *The black areas on the back of the leather are not stains, but rather variations in the penetration of the leather dye.