How to Measure a Folding-Clasp Strap

A folding-clasp strap (Tank style) is made of two pieces fixed at both ends — one end to the watch, the other to the folding clasp under your wrist. There are no holes to adjust later, so the two lengths need to be right before we cut. The easiest way to find them is with two strips of paper.

Step 1 — Cut two paper strips

Cut two straight strips of paper about as wide as your strap, and put a small piece of tape on each end.

Cutting two paper strips and taping their ends

Step 2 — Fix them to the watch

Tape one end of each strip to the watch lugs, in place of the strap.

Fixing the paper strips to the watch lugs

Step 3 — Fix them to the clasp

Tape the other ends to the folding clasp — one strip on each side of the clasp.

Fixing the other ends of the paper strips to the folding clasp

Step 4 — Try it on

Close the clasp and wear it. Adjust the strips until the watch sits where you like it on your wrist — snug, not tight.

Closing the folding clasp and trying the paper strap on the wrist

Step 5 — Measure each strip

Take it off and lay a ruler along each strip, from the watch lug to the clasp. Write down both numbers.

Measuring each paper strip with a steel ruler

What the two numbers mean

Each number is the length of one side, measured from the spring bar at the watch lug to the edge of the clasp frame. On most wrists the two sides are the same length; if your clasp sits off-centre, the two numbers will differ — just enter them as they are.

Common sizes

Your wrist Side 1 / Side 2
up to 15 cm 95 / 95 mm
15.1 – 15.8 cm 100 / 100 mm
15.9 – 16.4 cm 105 / 105 mm
16.5 – 17 cm 110 / 110 mm
17.1 – 17.8 cm 115 / 115 mm
17.9 – 18.8 cm 120 / 120 mm
18.9 – 19.8 cm 125 / 125 mm
19.9 – 20.8 cm 130 / 130 mm
20.9 – 22 cm 135 / 135 mm

Not sure? Add your wrist size and watch model in the notes when you order — we check every measurement before cutting.