For strap using pin buckle/butterfly clasp
Recommended strap length
Wrist size 14 to 15.4cm
Top length 65mm
Bottom Length 105mm
Wrist size 15.5 to 16.4cm
Top length 70mm
Bottom Length 110mm
Wrist size 16.5 to 17.8cm
Top length 75mm
Bottom Length 120mm
Wrist size 17.9 to 19cm
Top length 80mm
Bottom Length 125mm
Wrist size 19 to 21cm
Top length 85mm
Bottom Length 130mm
For strap using Cartier style folding clasp
Recommended strap length:
Wrist size 15 to 16.4cm
Top length 85mm
Bottom Length 95mm
Wrist size 16.5 to 18cm
Top length 90mm
Bottom Length 100mm
Wrist size 18.1 to 19.5cm
Top length 95mm
Bottom Length 105mm
Wrist size 19.6 to 21cm
Top length 100mm
Bottom Length 110mm