(3/8" or 9mm). Color: gold. 0.25" = 1/4" or 6mm - pretty small for standard button holes. 0.38" = 3/8" or 9mm - also fits standard button holes. 0.50" = 1/2" or 12.5mm -this is fairly large for standard button holes.
LN LENQIN Mens Watches Analog Quartz Watches for Men Stainless Steel Waterproof Men's Wrist Watch Easy Reader 38 mm Expansion Band
LN LENQIN Mens Watches Military Watch Analog Quartz Watches for Men Army Tactical Sports Field Watch Easy Reader 38 mm Waterproof Men's Wrist Watches with Nylon Band
Reflex Active Series 22 Smart Watch for Women Pink 1.38" Fitness Tracker, Calls, Notifications, Heart Rate Monitor, Calorie Counter, Compatible with Android iOS
Reflex Active Series 22 Smart Watch for Men & Women Black 1.38" Fitness Tracker, Calls, Notifications, Heart Rate Monitor, Calorie Counter, Compatible with Android iOS
Materia KA-285 Men's Anchor Pendant 925 Sterling Silver Men's Jewellery Black Antique Oxidised 23 x 38 mm
TRIXES Smart Watch Fob, White - Silicone Nurses Watch Fob - Compatible with Apple Watch Devices - Pin Clasp (White, 38-41mm)