Watch Almanac
Sinn

U1

Case diameter
44 mm
Measured in a published review
Lug-to-lug
47 mm
Measured in a published review
Thickness
15 mm
Measured in a published review
Lug width
22 mm
Measured in a published review
Ideal fit
Wrist flat: 55.1 mmLug-to-lug: 47 mm

How the U1 wears

Its lugs add only 3 mm to the 44 mm case, against 7.1 mm typical across the almanac, so it wears smaller than its diameter suggests.

On our fit model it sits best on wrists from 6.5" to 7.75" (16.5–19.7 cm); below 6.5" the lugs start to reach the edge of the wrist.

At 15 mm thick it is thicker than 96% of the 79 other dive watches we've measured, so expect it to sit tall on the wrist.

Its 22 mm lug width is one of the most common strap sizes; 27 other watches here share it, so aftermarket straps are easy to find.

Will the U1 fit your wrist?

With a 47 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.

WristFlat width (est.)Fit
6"47.2 mmLugs overhang
6.5"51.2 mmIdeal fit
7"55.1 mmIdeal fit
7.5"59.1 mmIdeal fit
8"63 mmWears small

Specifications

Reference
U1
Collection
U1
Status
In production
Case material
submarine steel
Crystal
sapphire
Style
Dive

Movement

Movement details coming soon.

Takes 22 mm straps. See other 22 mm watches and straps.

Watches that wear the same size

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

Same 22 mm lug width

All 22 mm watches

These take the same straps as the U1.

Sources