Wrist size visualizer
Case diameter and lug-to-lug drawn to scale (4px per mm) against a millimeter ruler — hold a ruler or tape measure up to the screen to compare.
mm circumference
Lug-to-lug (52.6mm) is approximately 97% of your estimated flat wrist width (54mm). May overhang the sides of your wrist.
Fit and value
- How it wears
- Large · 45 mm case, 52.6 mm lug-to-lug
- In the water
- Recreational diving · 200 m
- Price position
- Priced above 14% of watches in our catalogue
Explore similar
Seiko
Prospex Sumo
Dive
≈$898approx. market price (brand does not publish prices)
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- 45 × 12.9 mm
- Automatic
- 200 m water resistance
- 70 h power reserve
Case
- Case material
- Stainless steel
- Case diameter
- 45 mm
- Case thickness
- 12.9 mm
- Lug width
- 20 mm
- Lug-to-lug
- 52.6 mm
- Water resistance
- 200 m
- Screw-down crown
- Yes
- Dial colour
- Green
- Crystal
- Sapphire
- Case back
- Closed
- Case shape
- Round
Movement
- Movement
- Automatic
- Caliber
- 6R35
- Power reserve
- 70 hours
- Jewels
- 24
- Frequency
- 21,600 bph
Details
- Collection
- Prospex
- Reference number
- SPB103J1
- Country of origin
- Japan
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Frequently asked questions
How much does the Seiko Prospex Sumo cost?
The Seiko Prospex Sumo has a listed retail price of about $898. Street and pre-owned prices may differ.
How water resistant is the Seiko Prospex Sumo?
It is rated to 200 m of water resistance.
What movement does the Seiko Prospex Sumo use?
It uses a automatic movement with a power reserve of about 70 hours.
How big is the Seiko Prospex Sumo?
The case is 45 mm in diameter.