Specifications
- Reference
- 126621
- Family
- Yacht-Master
- Category
- Dive
- Status
- Current
- Case material
- Steel and rose gold
- Case diameter
- 40 mm
- Case thickness
- 11.7 mm Third-party
- Lug-to-lug
- 47 mm Third-party
- Lug width
- —
- Water resistance
- 100 m
- Bezel
- Rotating, diver
- Certifications
- Superlative Chronometer
- Calibre
- 3235 Official
- Power reserve
- about 70 h
Official product page · retrieved October 15, 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 47 mm on a flat top of 54.1 mm: 87 % 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 |
|---|---|---|---|
| 11.7 mm | Third-party | Bob's Watches Retailer size chart; the page says dimensions were taken with digital calipers on watches in its inventory and from other reputable sources. Figure listed for ref. 126622, the version of this case in another metal. | October 14, 2026 |
Lug-to-lug
| Value | Type | Source | Date |
|---|---|---|---|
| 47 mm | Third-party | Bob's Watches Retailer size chart; the page says dimensions were taken with digital calipers on watches in its inventory and from other reputable sources. Figure listed for ref. 126622, the version of this case in another metal. | October 14, 2026 |
Lug width
Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.
No source gave this figure yet.
Calibre source
Official Rolex · retrieved October 15, 2026
Other versions in the same case
These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.
Other Yacht-Master references
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Yacht-Master 40 126622 | 40 mm | 11.7 mm | 47–47.3 mm | 3235 |
| Yacht-Master 40 (18 ct Everose gold) 126655 | 40 mm | 11.7 mm | 47 mm | 3235 |
| Yacht-Master 42 (18 ct white gold) 226659 | 42 mm | — | — | 3235 |
| Yacht-Master 42 (RLX titanium) 226627 | 42 mm | — | — | 3235 |
| Yacht-Master 37 (Everose Rolesor) 268621 | 37 mm | — | — | 2236 |
| Yacht-Master 37 (18 ct Everose gold) 268655 | 37 mm | — | — | 2236 |
| Yacht-Master 37 (Rolesium) 268622 | 37 mm | — | — | 2236 |
Other Rolex models
| Watch | Ø | Thickness | Lug-to-lug | Calibre |
|---|---|---|---|---|
| Submariner 124060 | 41 mm | 12.2–12.5 mm⚠ | 47.6–48.2 mm | 3230 |
| Submariner Date 126610LN | 41 mm | 12.2–12.5 mm⚠ | 47.6–48.2 mm | 3235 |
| Submariner Date (18 ct yellow gold) 126618LN | 41 mm | 12.5 mm | 47.6 mm | 3235 |
| Submariner Date (Yellow Rolesor) 126613LB | 41 mm | 12.5 mm | 47.6 mm | 3235 |
| Sea-Dweller 126600 | 43 mm | 15 mm | 50.1–51 mm⚠ | 3235 |
| Deepsea 136660 | 44 mm | 17.7 mm | 51.5 mm | 3235 |