The leather material used is Tochigi Leather. This leather is crafted by hand using traditional techniques, resulting in a thick and durable material that still feels supple and lightweight thanks to the "Tochigi Leather + Momi (rubbing) Processing Technique." The main leather used this time is Tochigi Leather with the Momi processing technique. From the moment the leather wallet is completed, the leather will become familiar and change to a form with a moderate suppleness. Through traditional techniques, we have achieved a perceived weight reduction and softness that you wouldn't believe comes from the same material. For those who want more storage space but don't want to change the shape/style of the wallet too much, we have widened the zipper area to give the entire wallet more room, reducing the feeling of being cramped. Without significantly changing the perceived size, this provides approximately 5mm of extra space in the actual dimensions. Color: Black Size: Height 8.5cm, Width 11cm, Thickness 2.3cm (Standard Version) Purchased on Makuake. Please check the photos for any wear and tear or stains due to aging before purchasing. No claims, no returns. #makuake