Material:

Front: Genuine leather
Back: High-quality cow leather

Measurement:

Size: 16mm, 18mm, 19mm, 20mm, 21mm, 22mm, 24mm
Strap length: 120mm x 73mm
Strap thickness: 4mm-2mm

Buckle: Stainless steel buckle included

Feature: Quick-release spring bars

If you want other sizes, pls let me know, I will customize it perfectly for you