Seiko
Seiko Prospex King Turtle (SRPE03) Strap Size — 22mm Lug Width
The Seiko Prospex King Turtle (SRPE03) has a 22mm lug width, so it takes a 22mm watch strap.
Lug width22mm
| Lug width | 22 mm |
|---|---|
| Case size | 45 mm |
| Lug-to-lug | 47.7 mm |
| Thickness | — |
| 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 |
|---|---|---|
| King Turtle SRPE03 | 45mm | 22mm |
| Turtle SRP777 | 45mm | 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 Prospex King Turtle (SRPE03)
- 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 47.7mm lug-to-lug it should sit within the top of wrists from about 15.9cm up (rule of thumb: lug-to-lug under ~30% of wrist size). That's longer than 60% of the watches in our index. See what size watch suits your wrist.
Sources & corrections
Lug width checked against: Serious Watches: SRPE03K1. Last checked 24 October 2026.
Spec wrong for your watch? Send us a correction with your reference number.
Get the right strap
Links open Amazon — we may earn a commission at no cost to you.
Seiko Prospex King Turtle (SRPE03) — strap questions
What size strap does the Prospex King Turtle (SRPE03) take?
The Seiko Prospex King Turtle (SRPE03) has a 22mm lug width, so you need a 22mm watch strap.
Will any 22mm strap fit the Prospex King Turtle (SRPE03)?
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 Prospex King Turtle (SRPE03) use?
22mm long. We haven't confirmed the diameter for the Prospex King Turtle (SRPE03), so measure the original bar with calipers before buying replacements.
Is the Prospex King Turtle (SRPE03) 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.