Speedmaster 38

Ref. 324.30.38.50.02.001

Case diameter: 38 mm; Manufacturer spec
Lug-to-lug: 44.9 mm; Manufacturer spec
Thickness: 14.7 mm; Manufacturer spec
Lug width: 18 mm; Manufacturer spec

Retail price $6,300 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 44.9 mm

How the Speedmaster 38 wears

Its lugs add 6.9 mm to the 38 mm case, close to the 7 mm typical across the almanac, so its diameter is a fair guide to how it wears.

On our fit model it sits best on wrists from 6.25" to 7.5" (15.9–19.1 cm); below 6.25" the lugs start to reach the edge of the wrist.

At 14.7 mm thick it is thicker than 85% of the 40 other chronograph watches we've measured, so expect it to sit tall on the wrist.

Its 18 mm lug width is one of the most common strap sizes; 15 other watches here share it, so aftermarket straps are easy to find.

Will the Speedmaster 38 fit your wrist?

With a 44.9 mm lug-to-lug, here is how it wears across common wrist sizes. We estimate the flat top of each wrist from its circumference; measure yours for a closer answer in the fit finder.

Wrist	Flat width (est.)	Fit
6"	47.2 mm	Snug, lugs near the edge
6.5"	51.2 mm	Ideal fit
7"	55.1 mm	Ideal fit
7.5"	59.1 mm	Ideal fit
8"	63 mm	Wears small

Specifications

Reference: 324.30.38.50.02.001
Collection: Speedmaster
Status: In production
Case material: stainless steel
Crystal: sapphire
Water resistance: 100 m
Bezel: steel with grey aluminium tachymeter ring
Dial: silver (opaline)
Strap / bracelet: steel bracelet, butterfly clasp
Style: Chronograph

Movement

Caliber: Omega 3330
Type: automatic
Power reserve: 52 hours
Accuracy: COSC chronometer

Takes 18 mm straps. See other 18 mm watches and straps.

More Speedmaster references

Watches that wear the same size

Other watches within 1.5 mm of its lug-to-lug.

Same 18 mm lug width

All 18 mm watches

These take the same straps as the Speedmaster 38.