M8 Specifications:

Case Size: 40×34mm
Case Thickness: 10.6mm
Strap Size: 24×23mm
Materials:
Case: Copper
Crown, Case Back & Clasp: Stainless Steel

Features:
Strap：Nylon strap
Movement：Japanese quartz movement
Glass：Mineral hardened glass
water resistance：5ATM
Luminous dial (except logo) & hands