Watch Case Dimension Comparisons
It can be difficult to determine how a watch will fit on your wrist without trying it on first. Get a better feel for the size of a watch case by comparing the case diameter to the following diameters of common objects:
Nickel: 21.21mm
Quarter: 24.26mm
Half Dollar: 30.61mm
Poker Chip (standard): 39mm
Ping Pong Ball: 40mm
Golf Ball: 42.67mm
Tow Ball Hitch (ISO standard): 50mm
Racquetball: 57mm
Soda Can (standard): 65mm
Tennis Ball: 67mm