Seiko Prospex Sky SRPB57K1
The Seiko Prospex Sky SRPB57K1 takes a 22 mm watch band.

Seiko · Prospex Sky
- Lug width
- 22 mm
- Case diameter
- 45 mm
- Reference
- SRPB57K1
- Family
- Prospex Sky
- Case material
- Acciaio
- Model
- Prospex Sky SRPB57K1 Stainless Steel / Black
- Year
- 2017
Bands that fit
Cut and stitched in Milano, in the width this watch takes.
Will a strap close on your wrist?
Set for this watch: 45 mm of case and 22 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.
Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.
Sizing notes
- 22 mm is the gap between the lugs, so a 22 mm band goes in without adapters. Whether it sits flush against a 45 mm case depends on how that case is shaped.
- Inside the Prospex Sky family the lug width is not one number: it runs 20, 22, 24 mm. This reference is the 22 mm one, so a band bought for another Prospex Sky may not fit it. Why the size changes inside a family →
- 22 mm is one of the common sizes: 6,971 of the 41,485 watches measured take it, which is why it is the width most bands are cut in. Every watch that takes 22 mm →
Other Prospex Sky references
- Prospex Sky SRPB59K1 Stainless Steel / CreamSRPB59K1
22 mm - Prospex Sky SRPB61K1 Stainless Steel / BlackSRPB61K1
22 mm - Prospex Sky SSC261P1 Stainless Steel / BlackSSC261P1
24 mm - Prospex Sky SSC347P1 Stainless Steel / BlueSSC347P1
20 mm - Prospex Sky SSC349P1 Stainless Steel / BlackSSC349P1
20 mm - Prospex Sky SSC351P1 Stainless Steel / BlackSSC351P1
20 mm
Grey Hammered Leather Strap with Ecru Stitching
Vintage Olive Green Calf Leather Watch Strap
Saffiano Cognac Strap
Black Saffiano Rubber Strap
Black Calfskin NATO Strap




