Besseron Ultrathin Mens Watches with Silver-ton 40mm Case Imported Thin, refined and perfectly round watch. Minimalistic and without too many features. 316L stainless steel watch case. It would be better than other watches made of 304 steel or alloy. It could be more durable in the abrasion and corrosion resistance. Also, the silver color of the watch is flashy and classy. The back of the watch , and the adjusting buckle are polished finished stainless steel, giving a bright shine to the watch Japan quartz movement. It keeps accurate time - no trouble with it going faster or slowing down. Also, it has the quiet ticking. With a second hand ,it helps to keep time while playing sports. Case Diameter: 40mm ; Case Thickness: 8mm ( ultra-thin ); Band Length: 190mm ( 75mm+115mm ) ; Band Width: 20mm ; Band Thinckness:4mm ; Watch Total Length: 245mm