WRIST FIT REPORT / ROUND GMT
Tudor
Black Bay GMT
A 50mm span and nearly 15mm thickness make this materially larger than the BB58.
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 | 119% | -8mm | LIKELY OVERHANG | 35/100 |
| 15cm5.91in | 45mm | 111% | -5mm | LIKELY OVERHANG | 35/100 |
| 16cm6.3in | 48mm | 104% | -2mm | LIKELY OVERHANG | 58/100 |
| 16.5cm6.5in | 49.5mm | 101% | -0.5mm | BOLD EDGE | 86/100 |
| 17cm6.69in | 51mm | 98% | +1mm | BOLD EDGE | 91/100 |
| 18cm7.09in | 54mm | 93% | +4mm | BALANCED | 98/100 |
| 19cm7.48in | 57mm | 88% | +7mm | BALANCED | 91/100 |
A 50mm span and nearly 15mm thickness make this materially larger than the BB58.
Try it under a cuff and through a full wrist rotation before buying on specification alone.
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 Tudor Black Bay GMT 79830RB.
Before the
try-on.
Will the Tudor Black Bay GMT 79830RB fit a 6.5 inch wrist?+
At 16.5cm / 6.5in, the directional model reads bold edge with 101% lug-span coverage. Wrist shape and articulation still require a try-on.
What are the Tudor Black Bay GMT 79830RB dimensions?+
The fit model uses 41mm case width, 50mm measured span and 14.6mm thickness.
What matters most for this watch on wrist?+
Try it under a cuff and through a full wrist rotation before buying on specification alone.
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.