Watch Almanac
Grand Seiko

Evolution 9 Spring Drive 5 Days

Ref. SLGA009 · “White Birch”

Case diameter
40 mm
Manufacturer spec
Lug-to-lug
47.9 mm
Manufacturer spec
Thickness
11.8 mm
Manufacturer spec
Lug width
22 mm
Manufacturer spec

Retail price $9,800 (US, Oct 2026)

Ideal fit
Wrist flat: 55.1 mmLug-to-lug: 47.9 mm

How the Evolution 9 Spring Drive 5 Days wears

Its lugs add 7.9 mm to the 40 mm case, close to the 7.1 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 6.75" to 8" (17.1–20.3 cm); below 6.75" the lugs start to reach the edge of the wrist.

At 11.8 mm thick it is thicker than 59% of the 80 other everyday 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 Evolution 9 Spring Drive 5 Days fit your wrist?

With a 47.9 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.

WristFlat width (est.)Fit
6"47.2 mmLugs overhang
6.5"51.2 mmSnug, lugs near the edge
7"55.1 mmIdeal fit
7.5"59.1 mmIdeal fit
8"63 mmIdeal fit

Specifications

Reference
SLGA009
Collection
Evolution 9
Status
In production
Case material
stainless steel
Crystal
dual-curved sapphire
Water resistance
100 m
Bezel
steel
Dial
white (birch bark pattern)
Strap / bracelet
stainless steel bracelet, folding clasp
Weight
176 g
Style
Everyday, Dress

Movement

Caliber
Grand Seiko 9RA2
Type
spring drive
Power reserve
120 hours
Accuracy
+/-10 s/month (+/-0.5 s/day)

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

More Evolution 9 references

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 Evolution 9 Spring Drive 5 Days.

Sources