How is watch strap length measured?

Two-piece straps are listed as long end / short end in millimetres (e.g. 115/75). The long end has the holes; the short end holds the buckle.

Where should the buckle sit?

Most people prefer the buckle roughly in the centre of the underside of the wrist. Moving the short end length changes buckle position.

Choose the longer option if you like more tail or room to adjust; choose shorter for a cleaner look with less excess.

Wrist circumference Preferred buckle position Number of holes on long end

A well-fitted two-piece strap has the buckle roughly centred under the wrist and 1–2 free holes on either side of the pin for adjustment.

Short

≈ 105–110 / 65–70 mm · best under \~16.5 cm wrist

Regular / Standard

≈ 115–120 / 70–75 mm · most common

Long

≈ 125–135 / 75–85 mm · larger wrists or more tail

These are typical leather / rubber two-piece ranges. Always check the exact listing. NATO and one-piece straps use different sizing.

How do I measure my wrist? Wrap a soft tape (or string + ruler) where you normally wear the watch. Do not pull tight.

What does 115/75 mean? Long end 115 mm (holes) / short end 75 mm (buckle side). Buckle length is usually not included.

Can I change buckle position later? Only by choosing a different short-end length or having a custom strap made.

What about deployant clasps? Deployant / butterfly clasps use different geometry. This tool is for classic pin-buckle two-piece straps.