Thinnest Seiko watches
Every current Seiko we track, ranked by the case thickness Seiko publishes. The slimmest is 7.5 mm.
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The short answer
The thinnest current Seiko we track is the Seiko SUT068 at 7.5 mm. The thinnest automatic is the Seiko SJE109 at 9.9 mm, and the thinnest ISO 6425 diver is the Seiko HBB001 at 12.3 mm.
How we ranked
Current, non-limited Seiko references sorted by the case thickness Seiko publishes. Where several references share a case, movement and size (usually different dial colours), we list the first one only. Thickness is measured by the brand and usually includes the crystal; how thin a watch feels also depends on case shape and strap.
The 15 thinnest current Seiko watches
| Buy | ||||||
|---|---|---|---|---|---|---|
| 1 | Seiko SUT068 Diamond Collection | 7.5 mm | 27 mm | Solar · V137 | $495 (US list) | Amazon → |
| 2 | Seiko SUR579 Diamond Collection | 8.2 mm | 32 mm | – · 6N32 | $525 (US list) | Amazon → |
| 3 | Seiko SUR595 Prospex | 8.7 mm | 34 mm | Quartz · 6N01 | $795 (US list) | Amazon → |
| 4 | Seiko SUR605 Prospex | 8.9 mm | 34 mm | Quartz · 6N01 | $795 (US list) | Amazon → |
| 5 | Seiko SJE109 King Seiko | 9.9 mm | 39.4 mm | Automatic · 6L35 | $3,100 (US list) | Amazon → |
| 6 | Seiko SNE506 Coutura | 10.2 mm | 42.5 mm | Solar · V157 | $625 (US list) | Amazon → |
| 7 | Seiko SRPL61 Presage | 10.7 mm | 34 mm | Automatic · 4R35 | $550 (US list) | Amazon → |
| 8 | Seiko SJE089 King Seiko | 10.7 mm | 38.6 mm | Automatic · 6L35 | $3,300 (US list) | Amazon → |
| 9 | Seiko SRE007 Presage | 10.9 mm | 30.3 mm | Automatic · 2R05 | $575 (US list) | Amazon → |
| 10 | Seiko SRE003 Seiko 5 Sports | 11.2 mm | 28 mm | Automatic · 2R06 | $315 (US list) | Amazon → |
| 11 | Seiko SRP839 Presage | 11.3 mm | 33.8 mm | Automatic · 4R35 | $475 (US list) | Amazon → |
| 12 | Seiko SRE021 Seiko 5 Sports | 11.4 mm | 32 mm | Automatic · 2R06 | $385 (US list) | Amazon → |
| 13 | Seiko SRPE57 Seiko 5 Sports | 11.5 mm | 40 mm | Automatic · 4R36 | $315 (US list) | Amazon → |
| 14 | Seiko SSG021 Coutura | 11.5 mm | 44.6 mm | Solar (GPS/radio) · 8B92 | $750 (US list) | Amazon → |
| 15 | Seiko SSG009 Coutura | 11.5 mm | 45.3 mm | Solar (GPS/radio) · 8B92 | $650 (US list) | Amazon → |
Thinnest Seiko automatics
| Buy | ||||||
|---|---|---|---|---|---|---|
| 1 | Seiko SJE109 King Seiko | 9.9 mm | 39.4 mm | Automatic · 6L35 | $3,100 (US list) | Amazon → |
| 2 | Seiko SJE089 King Seiko | 10.7 mm | 38.6 mm | Automatic · 6L35 | $3,300 (US list) | Amazon → |
| 3 | Seiko SRPL61 Presage | 10.7 mm | 34 mm | Automatic · 4R35 | $550 (US list) | Amazon → |
| 4 | Seiko SRE007 Presage | 10.9 mm | 30.3 mm | Automatic · 2R05 | $575 (US list) | Amazon → |
| 5 | Seiko SRE003 Seiko 5 Sports | 11.2 mm | 28 mm | Automatic · 2R06 | $315 (US list) | Amazon → |
Thinnest Seiko quartz
| Buy | ||||||
|---|---|---|---|---|---|---|
| 1 | Seiko SUR595 Prospex | 8.7 mm | 34 mm | Quartz · 6N01 | $795 (US list) | Amazon → |
| 2 | Seiko SUR605 Prospex | 8.9 mm | 34 mm | Quartz · 6N01 | $795 (US list) | Amazon → |
| 3 | Seiko SRWZ24 Coutura | 11.7 mm | 45.6 mm | Quartz · 7T12 | $575 (US list) | Amazon → |
Thinnest Seiko solar
| Buy | ||||||
|---|---|---|---|---|---|---|
| 1 | Seiko SUT068 Diamond Collection | 7.5 mm | 27 mm | Solar · V137 | $495 (US list) | Amazon → |
| 2 | Seiko SNE506 Coutura | 10.2 mm | 42.5 mm | Solar · V157 | $625 (US list) | Amazon → |
| 3 | Seiko SSG009 Coutura | 11.5 mm | 45.3 mm | Solar (GPS/radio) · 8B92 | $650 (US list) | Amazon → |
| 4 | Seiko SSG021 Coutura | 11.5 mm | 44.6 mm | Solar (GPS/radio) · 8B92 | $750 (US list) | Amazon → |
| 5 | Seiko SSG022 Coutura | 11.5 mm | 45.5 mm | Solar (GPS/radio) · 8B92 | $725 (US list) | Amazon → |
Thinnest Seiko dive watches (ISO 6425)
| Buy | ||||||
|---|---|---|---|---|---|---|
| 1 | Seiko HBB001 Prospex | 12.3 mm | 41.7 mm | Automatic · 4R35 | $595 (US list) | Amazon → |
| 2 | Seiko SJE099 Prospex | 12.3 mm | 39.5 mm | Automatic · 6L37 | $2,800 (US list) | Amazon → |
| 3 | Seiko SPB317 Prospex | 12.3 mm | 41 mm | Automatic · 6R35 | $900 (US list) | Amazon → |
| 4 | Seiko SPB481 Prospex | 12.5 mm | 41.3 mm | Automatic · 6R55 | $1,100 (US list) | Amazon → |
| 5 | Seiko SRPE33 Prospex | 12.8 mm | 43.8 mm | Automatic · 4R35 | $650 (US list) | Amazon → |
Thinnest Grand Seiko
For comparison, Seiko's high-end sister brand.
| Buy | ||||||
|---|---|---|---|---|---|---|
| 1 | Grand Seiko STGF387 Heritage | 8.1 mm | 26 mm | Quartz · 4J51 | $4,200 (US list) | Amazon → |
| 2 | Grand Seiko STGF359 Heritage | 8.7 mm | 28.9 mm | Quartz · 4J52 | $2,600 (US list) | Amazon → |
| 3 | Grand Seiko STGF385 Heritage | 8.8 mm | 28.9 mm | Quartz · 4J52 | $6,100 (US list) | Amazon → |
| 4 | Grand Seiko SBGX363 Heritage | 9 mm | 32.3 mm | Quartz · 9F51 | $3,600 (US list) | Amazon → |
| 5 | Grand Seiko SBGX359 Heritage | 9.1 mm | 33 mm | Quartz · 9F51 | n/p | Amazon → |
| 6 | Grand Seiko SBGZ003 Masterpiece | 9.8 mm | 38.5 mm | Spring Drive · 9R02 | n/p | Amazon → |
| 7 | Grand Seiko SLGW003 Evolution 9 | 9.95 mm | 38.6 mm | Manual-wind · 9SA4 | $11,600 (US list) | Amazon → |
| 8 | Grand Seiko SLGW007 Evolution 9 | 9.95 mm | 38.6 mm | Manual-wind · 9SA4 | $10,000 (US list) | Amazon → |
Slim watches suit smaller wrists too: see best Seiko watches for small wrists and check strap sizes in the lug width chart.
Questions
What is the thinnest Seiko watch?
Of the current references we track, the Seiko SUT068 at 7.5 mm, per Seiko.
What is the thinnest Seiko automatic?
The Seiko SJE109 at 9.9 mm.
What is the thinnest Seiko dive watch?
The Seiko HBB001 at 12.3 mm, among ISO 6425 divers we track.
Does thickness include the crystal?
Brands usually measure overall case height including the crystal, but rarely say so explicitly. Treat small differences (under 0.3 mm) as negligible.
Watch.co is independent and not affiliated with any brand. We haven't handled these watches for this page: everything here comes from brand-published specs and our own analysis. Brand names are used only to identify products.