Seiko Prospex Divers SBDX017

The Seiko Prospex Divers SBDX017 takes a 20 mm watch band.

Seiko Prospex Divers SBDX017, 20 mm lug width

Seiko · Prospex Divers

Lug width
20 mm
Case diameter
44 mm
Reference
SBDX017
Family
Prospex Divers
Case material
Acciaio
Model
Prospex Diver Marinemaster 300 Stainless Steel / Black / Bracelet
Year
2015

Will a strap close on your wrist?

Set for this watch: 44 mm of case and 20 mm between the lugs. Add your wrist and see where a standard strap would close.

mm

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.

75 mm115 mm

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 44 mm case depends on how that case is shaped.
  • Inside the Prospex Divers family the lug width is not one number: it runs 19, 20, 22, 24 mm. This reference is the 20 mm one, so a band bought for another Prospex Divers 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 →