Specifications
- Reference
- SLGB003G
- Family
- Evolution 9
- Category
- Classic
- Status
- Current
- Case material
- Titanium
- Case diameter
- 37 mm
- Case thickness
- 11.4 mm Official
- Lug-to-lug
- 44.3 mm Official
- Lug width
- 20 mm Official
- Water resistance
- 100 m
- Bezel
- —
- Calibre
- 9RB2 Official
- Power reserve
- about 72 h
Official product page · retrieved October 14, 2026
Does it fit your wrist?
Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.
Comfortable
Lug-to-lug 44.3 mm on a flat top of 54.1 mm: 82 % of the width.
Lug-to-lug is 75 to 95% of the flat top, the usual comfortable range.
Measurements and sources
Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.
Case thickness
| Value | Type | Source | Date |
|---|---|---|---|
| 11.4 mm | Official | Grand Seiko | October 14, 2026 |
Lug-to-lug
| Value | Type | Source | Date |
|---|---|---|---|
| 44.3 mm | Official | Grand Seiko | October 14, 2026 |
Lug width
Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.
| Value | Type | Source | Date |
|---|---|---|---|
| 20 mm | Official | Grand Seiko Published as “band width”. | October 14, 2026 |
Calibre source
Official Grand Seiko · retrieved October 14, 2026
Other Evolution 9 references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Evolution 9 SLGA019 SLGA019G | 40 mm | 11.8 mm | 47.9 mm | 9RA2 |
| Evolution 9 SLGC001 Tentagraph SLGC001G | 43.2 mm | 15.3 mm | 51.5 mm | 9SC5 |
| Evolution 9 SLGH005 “White Birch” SLGH005G | 40 mm | 11.7 mm | 47 mm | 9SA5 |
| Evolution 9 SLGW003 SLGW003G | 38.6 mm | 10 mm | 45 mm | 9SA4 |
Same brand in the data set
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Elegance SBGA407 “Skyflake” SBGA407G | 40.2 mm | 12.8 mm | 48.5 mm | 9R65 |
| Elegance SBGM221 GMT SBGM221G | 39.5 mm | 13.7 mm | 46.9 mm | 9S66 |
| Elegance SBGW301 SBGW301G | 37.3 mm | 11.7 mm | 44.3 mm | 9S64 |
| Elegance SBGY007 “Omiwatari” SBGY007G | 38.5 mm | 10.2 mm | 43.7 mm | 9R31 |
| Heritage SBGA211 “Snowflake” SBGA211G | 41 mm | 12.5 mm | 49 mm | 9R65 |
| Heritage SBGA413 SBGA413G | 40 mm | 12.8 mm | 47 mm | 9R65 |
| Heritage SBGH341 SBGH341G | 38 mm | 12.9 mm | 44.7 mm | 9S85 |
| Sport SBGE257 Spring Drive GMT SBGE257G | 40.5 mm | 14.7 mm | 48.7 mm | 9R66 |
| Sport SBGE277 Spring Drive GMT SBGE277G | 44 mm | 14.7 mm | 50.8 mm | 9R66 |
| Sport SBGJ237 Mechanical GMT SBGJ237G | 44.2 mm | 14.4 mm | 50.6 mm | 9S86 |
| Sport SBGM247 GMT SBGM247G | 40.5 mm | 14.4 mm | 48.6 mm | 9S66 |