WRIST FIT REPORT / ROUND MULTI-FACET
Grand Seiko
Lake Suwa
The thin 9RA2 movement helps keep a 40mm sports case under 12mm thick.
Seven wrists.
One footprint.
The model estimates flat wrist width at 30% of circumference, then compares the measured span. Use the spectrum to identify where a try-on becomes essential.
| WRIST | EST. WIDTH | COVERAGE | MARGIN | READ | INDEX |
|---|---|---|---|---|---|
| 14cm5.51in | 42mm | 114% | -5.9mm | LIKELY OVERHANG | 35/100 |
| 15cm5.91in | 45mm | 106% | -2.9mm | LIKELY OVERHANG | 43/100 |
| 16cm6.3in | 48mm | 100% | +0.1mm | BOLD EDGE | 82/100 |
| 16.5cm6.5in | 49.5mm | 97% | +1.6mm | BOLD EDGE | 87/100 |
| 17cm6.69in | 51mm | 94% | +3.1mm | BALANCED | 92/100 |
| 18cm7.09in | 54mm | 89% | +6.1mm | BALANCED | 98/100 |
| 19cm7.48in | 57mm | 84% | +9.1mm | BALANCED | 92/100 |
The thin 9RA2 movement helps keep a 40mm sports case under 12mm thick.
Large polished facets amplify wrist presence even with controlled dimensions.
The footprint works.
Now verify the watch.
Fit is one gate. Price, condition, service history and seller quality still decide whether the individual example deserves your capital.
Keep the fit.
Watch the market.
Get the Tuesday buyer brief, the 10-point checklist and new research for Grand Seiko Lake Suwa SLGA021.
Before the
try-on.
Will the Grand Seiko Lake Suwa SLGA021 fit a 6.5 inch wrist?+
At 16.5cm / 6.5in, the directional model reads bold edge with 97% lug-span coverage. Wrist shape and articulation still require a try-on.
What are the Grand Seiko Lake Suwa SLGA021 dimensions?+
The fit model uses 40mm case width, 47.9mm measured span and 11.8mm thickness.
What matters most for this watch on wrist?+
Large polished facets amplify wrist presence even with controlled dimensions.
Is this fit result a guarantee?+
No. It is directional geometry based on an estimated flat wrist width. Try the watch on or compare a clear top-down wrist photo before buying.