Seiko
Seiko 5 Sports GMT (SSK001) Strap Size — 22mm Lug Width
The Seiko 5 Sports GMT (SSK001) has a 22mm lug width, so it takes a 22mm watch strap.
Lug width22mm
| Lug width | 22 mm |
|---|---|
| Case size | 42.5 mm |
| Lug-to-lug | 46 mm |
| Thickness | 13.6 mm |
| Spring bar Ø (typical) | Not confirmed |
| End type | Straight |
Which reference do you have?
Similar-looking models can take different straps. Your reference number is on the case back or your papers.
| Model | Case | Strap |
|---|---|---|
| 5 Sports GMT (SSK001) | 42.5mm | 22mm |
| 5 Sports (SRPD / 5KX) | 42.5mm | 22mm |
Strap styles that fit
- NATO / Zulu22mm fits if the strap's thickness clears the case under the bars.
- PerlonWoven pass-through, 22mm.
- 2-piece leatherStraight ends fit flush.
- Rubber / siliconeDivers & sports fit well.
- Milanese / meshStraight-end 22mm mesh fits.
- Metal braceletNeeds 22mm end-links shaped for this case.
Fit & sizing notes for the 5 Sports GMT (SSK001)
- Width: buy 22mm straps. Tapered straps listed as 22/20mm or 22/18mm fit too; only the first number has to match. See strap sizes explained.
- Spring bars: 22mm long. We haven't confirmed the diameter for this model, so measure the old bar before buying replacements (spring bar sizes).
- Wrist fit: at 46mm lug-to-lug it should sit within the top of wrists from about 15.3cm up (rule of thumb: lug-to-lug under ~30% of wrist size). That's longer than 22% of the watches in our index. See what size watch suits your wrist.
- Strap thickness: at 13.6mm thick it's a chunky case: thicker padded leather, rubber/FKM or a heavier NATO balance it visually; very thin straps can look undersized.
Sources & corrections
Lug width checked against: Teddy Baldassarre: SSK001; Serious Watches: SSK001. Last checked 24 October 2026.
Spec wrong for your watch? Send us a correction with your reference number.
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Seiko 5 Sports GMT (SSK001) — strap questions
What size strap does the 5 Sports GMT (SSK001) take?
The Seiko 5 Sports GMT (SSK001) has a 22mm lug width, so you need a 22mm watch strap.
Will any 22mm strap fit the 5 Sports GMT (SSK001)?
Most will. Width is the main thing to match, but also check that the strap's spring-bar holes suit the bars, and that the strap is thin enough to clear the case between the lugs. A metal bracelet needs 22mm end-links made for this model.
What spring bar size does the 5 Sports GMT (SSK001) use?
22mm long. We haven't confirmed the diameter for the 5 Sports GMT (SSK001), so measure the original bar with calipers before buying replacements.
Is the 5 Sports GMT (SSK001) good for strap swapping?
Yes. With standard 22mm spring-bar lugs, NATO, leather, rubber and mesh straps can all be fitted with a spring-bar tool.