Watch Almanac
Seiko

Essentials Quartz

Ref. SUR525

Case diameter
40.2 mm
Manufacturer spec
Lug-to-lug
47 mm
Manufacturer spec
Thickness
8.3 mm
Manufacturer spec
Lug width
20 mm
Manufacturer spec

Retail price $265 (US, Oct 2026)

Ideal fit
Wrist flat: 55.1 mmLug-to-lug: 47 mm

How the Essentials Quartz wears

Its lugs add 6.8 mm to the 40.2 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 6.5" to 7.75" (16.5–19.7 cm); below 6.5" the lugs start to reach the edge of the wrist.

At 8.3 mm thick it is slimmer than 94% of the 142 other everyday watches we've measured, so it slides under a cuff more easily than most.

Its 20 mm lug width is one of the most common strap sizes; 186 other watches here share it, so aftermarket straps are easy to find.

Will the Essentials Quartz 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
SUR525
Collection
Essentials
Status
In production
Case material
stainless steel
Crystal
sapphire
Water resistance
100 m
Bezel
fixed
Dial
blue
Strap / bracelet
stainless steel bracelet, tri-fold push-button clasp
Style
Everyday, Dress

Movement

Caliber
Seiko 6N52
Type
quartz

Takes 20 mm straps. See other 20 mm watches and straps.

More Essentials references

Watches that wear the same size

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

Same 20 mm lug width

All 20 mm watches

These take the same straps as the Essentials Quartz.

Sources