Material:Metal Compatible Model: Tudor Prince Specification： Men's double calendar is generally selected with a thickness of 30.6mm (strap width 20mm) Men's single calendar usually chooses 29.1mm (strap width 19mm) Medium sized form calendars generally choose 27.9mm (strap width 17mm) Women's watches generally have a size of 20.8mm (strap width 13mm) Women's small size generally 17.9mm in size What is including:1x Watch Bezel.