Apple Watch Band Size Chart

For 38mm/40mm Case Apple Watch:
(XS): 130 - 150mm (5⅛ ”-6”)
(S): 140 - 170mm (5½”-6⅝”)
(M): 155 - 185mm (6⅛"-7¼")
(L): 180 - 205mm (7”-8”)
(XL): 200 - 225mm (7⅞"-8⅞")
(2XL): 220 - 245mm (8⅝”-9⅝")

For 42mm/44mm Case Apple Watch:
(XS): 135 - 155mm (5¼ ”-6⅛”)
(S): 145 - 175mm (5¾”-6⅞”)
(M): 160 - 190mm (6¼"-7½")
(L): 180 - 210mm (7”-8¼”)
(XL): 200 - 230mm (7⅞”-9”)
(2XL): 220 - 250mm (8⅝”-9⅞")

To know your wrist size, simply measure your wrist with a flexible ruler or a strip of paper.

There would be less excess length if you choose the one has the maximum size that closest to your wrist size. For example, if your wrist size is 6½” (165mm), S size would be best! We can also customize the size, please contact us! :)