Grand Seiko Sport SBGM245
The Grand Seiko Sport SBGM245 takes a 20 mm watch band.

Grand Seiko · Sport
- Lug width
- 20 mm
- Case diameter
- 40.5 mm
- Reference
- SBGM245
- Family
- Sport
- Water resistance
- 200
- Model
- Sport SBGM245
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: 40.5 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.
Enter your wrist measurement to see whether a standard 75/115 mm strap closes on you, and where.
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 40.5 mm case depends on how that case is shaped.
- Inside the Sport family the lug width is not one number: it runs 19, 20, 21, 22, 23 mm. This reference is the 20 mm one, so a band bought for another Sport 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 →
Other Sport references
- Sport 3-DAY-GMT-SBGE3073-DAY-GMT-SBGE307
23 mm - Sport 36000-GMT-SBGJ27736000-GMT-SBGJ277
21 mm - Sport SBGA461SBGA461
22 mm - Sport SBGA463SBGA463
22 mm - Sport SBGA481SBGA481
23 mm - Sport SBGC242SBGC242
21 mm
Hammered Calfskin Strap Light Blue
Hammered Calfskin Strap Light Blue
Hammered Black Calfskin Strap — Ecru Stitching
Red Suede Strap with Stitching — Milano Straps
Natural Calfskin NATO Strap




