Jaeger-LeCoultre Master Ultra Thin 1258401

The Jaeger-LeCoultre Master Ultra Thin 1258401 takes a 20 mm watch band.

Jaeger-LeCoultre · Master Ultra Thin

20mm

lug width

Shop 20 mm bands

Every watch that takes 20 mm →

Lug width: 20 mm
Case diameter: 34 mm
Reference: 1258401
Family: Master Ultra Thin
Case material: Acciaio
Model: Master Ultra Thin Moon 34 Stainless Steel / Diamond / Silver / Alligator

Bands that fit

Cut and stitched in Milano, in the width this watch takes.

Black Rubberized Alligator Strap with Red Tribal Stitching€185

Matte Dark Gray Alligator Strap€195

Matte Black Alligator Strap — Minimal Stitching€149

Vintage Brown Calfskin Strap — Natural Patina€98

Hammered calfskin strap in cuoio€98

See every 20 mm band →

Will a strap close on your wrist?

Set for this watch: 34 mm of case and 20 mm between the lugs. Add your wrist and see where a standard strap would close.

Your wrist

Watch length, lug to lug

Filled in with the case diameter, which is what we hold for this reference. Measure the watch tip to tip for the exact answer: it is usually a few mm more.

Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.

Why ready-made straps come in one length →

Sizing notes

20 mm is the gap between the lugs, so a 20 mm band goes in without adapters. Whether it sits flush against a 34 mm case depends on how that case is shaped.
Inside the Master Ultra Thin family the lug width is not one number: it runs 17, 18, 20, 21, 22 mm. This reference is the 20 mm one, so a band bought for another Master Ultra Thin may not fit it. Why the size changes inside a family →
20 mm is one of the common sizes: 15,081 of the 41,485 watches measured take it, which is why it is the width most bands are cut in. Every watch that takes 20 mm →