C-Black

Ref. SB03B100

Case diameter: 47 mm; Manufacturer spec
Lug-to-lug: 44.8 mm; Manufacturer spec
Thickness: 11.8 mm; Manufacturer spec
Lug width: —; Not published

Retail price $155 (US, Oct 2026)

Your wristIdeal fit

Wrist flat: 55.1 mmLug-to-lug: 44.8 mm

How the C-Black wears

Its lugs add only -2.2 mm to the 47 mm case, against 7 mm typical across the almanac, so it wears smaller than its diameter suggests.

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 11.8 mm thick it is thicker than 64% of the 166 other everyday watches we've measured, so expect it to sit tall on the wrist.

Will the C-Black fit your wrist?

With a 44.8 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: SB03B100
Collection: Big Bold
Status: In production
Case material: Bioceramic
Crystal: bio-sourced plastic
Water resistance: 30 m
Bezel: Bioceramic bezel
Dial: transparent
Strap / bracelet: black bio-sourced strap, aluminium half buckle
Style: Everyday

Movement

Caliber: Swatch quartz (Swatch)
Type: quartz

2 other watches use the Swatch quartz (Swatch)

Watches that wear the same size

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

Sources

swatch.com/en-us/c-black-sb03b100/SB03B100.html