Omega Watch Dimensions: Diameter, Thickness, Lug-to-Lug

Wrist fit is a function of four numbers: diameter (the dial-side measure), thickness (how much the case sits off the wrist), lug-to-lug (the most important fit dimension), and lug width (the strap or bracelet endlink size). Bracelet taper is the difference between lug width and clasp end. The Speedmaster Pro and Seamaster Diver 300M are the two reference points buyers usually compare against.

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Family	Model	Reference	Diameter	Thickness	Lug-to-Lug	Lug Width	Bracelet Taper	Water	Movement
Speedmaster	Speedmaster Professional Moonwatch	310.30.42.50.01.001	42 mm	13.2 mm	47.5 mm	19 mm	19 → 16 mm	50 m	Cal. 3861
Speedmaster	Speedmaster Moonwatch (Sapphire)	310.30.42.50.01.002	42 mm	13.6 mm	47.5 mm	19 mm	19 → 16 mm	50 m	Cal. 3861
Speedmaster	Speedmaster Calibre 321 (Ed White)	311.30.40.30.01.001	39.7 mm	14.4 mm	47.0 mm	19 mm	19 → 16 mm	50 m	Cal. 321
Speedmaster	Speedmaster '57	332.10.41.51.02.001	40.5 mm	12.99 mm	46.0 mm	20 mm	20 → 16 mm	50 m	Cal. 9906
Speedmaster	Speedmaster Racing	329.30.44.51.06.001	44.25 mm	14.9 mm	50.0 mm	21 mm	21 → 18 mm	50 m	Cal. 9900
Seamaster	Seamaster Diver 300M	210.30.42.20.01.001	42 mm	13.6 mm	49.0 mm	20 mm	20 → 18 mm	300 m	Cal. 8800
Seamaster	Seamaster 300	234.30.41.21.01.001	41 mm	13.85 mm	48.0 mm	19 mm	19 → 16 mm	300 m	Cal. 8912
Seamaster	Seamaster Aqua Terra 38	220.10.38.20.06.001	38 mm	13.2 mm	45.0 mm	19 mm	19 → 16 mm	150 m	Cal. 8800
Seamaster	Seamaster Aqua Terra 41	220.10.41.21.10.001	41 mm	13.7 mm	48.0 mm	20 mm	20 → 16 mm	150 m	Cal. 8900
Seamaster	Seamaster Planet Ocean 600M	215.30.44.21.01.001	43.5 mm	16.55 mm	52.0 mm	21 mm	21 → 18 mm	600 m	Cal. 8900
Seamaster	Seamaster Planet Ocean 39.5	215.33.40.20.04.001	39.5 mm	14.45 mm	47.0 mm	19 mm	19 → 16 mm	600 m	Cal. 8800
Seamaster	Seamaster Ploprof 1200M	227.30.55.21.01.001	55 × 48 mm	17.5 mm	55.0 mm	24 mm	integrated, no taper	1,200 m	Cal. 8912
Seamaster	Seamaster Railmaster	220.10.40.20.01.001	40 mm	12.65 mm	47.0 mm	20 mm	20 → 16 mm	150 m	Cal. 8806
Constellation	Constellation 39	131.10.39.20.06.001	39 mm	12.25 mm	45.0 mm	integrated	22 → 18 mm	100 m	Cal. 8900
Constellation	Constellation 41	131.10.41.21.13.002	41 mm	12.95 mm	47.0 mm	integrated	24 → 20 mm	100 m	Cal. 8900
De Ville	De Ville Prestige 39.5	424.13.40.20.06.001	39.5 mm	10.5 mm	46.0 mm	19 mm	19 → 16 mm (leather)	30 m	Cal. 2500
De Ville	De Ville Trésor	435.13.40.21.02.001	40 mm	10.5 mm	47.0 mm	20 mm	20 → 16 mm (leather)	30 m	Cal. 8910
Globemaster	Globemaster	130.30.39.21.06.001	39 mm	12.5 mm	47.0 mm	19 mm	19 → 16 mm	100 m	Cal. 8900

Specs from the manufacturer's published technical data. Lug-to-lug values reflect commonly-cited caliper measurements where the manufacturer does not publish them and may vary by ±0.5 mm. References cover the principal current production variants per family - bezel, dial, and metal-option references usually share case dimensions.

Omega Watch Dimensions

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