Casio
Casio A158WA Strap Size — 18mm Lug Width
The Casio A158WA has a 18mm lug width, so it takes a 18mm watch strap.
Lug width18mm
| Lug width | 18 mm |
|---|---|
| Case size | 33.2 mm |
| Lug-to-lug | 36.8 mm |
| Thickness | 8.2 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 |
|---|---|---|
| A158WA | 33.2mm | 18mm |
| A168 Vintage | 36.3mm | 18mm |
Strap styles that fit
- NATO / Zulu18mm fits if the strap's thickness clears the case under the bars.
- PerlonWoven pass-through, 18mm.
- 2-piece leatherStraight ends fit flush.
- Rubber / siliconeDivers & sports fit well.
- Milanese / meshStraight-end 18mm mesh fits.
- Metal braceletNeeds 18mm end-links shaped for this case.
▲ Slim and light: thin 18mm straps and single-pass styles suit it best.
Fit & sizing notes for the A158WA
- Width: buy 18mm straps. Tapered straps listed as 18/16mm or 18/14mm fit too; only the first number has to match. See strap sizes explained.
- Spring bars: 18mm long. We haven't confirmed the diameter for this model, so measure the old bar before buying replacements (spring bar sizes).
- Wrist fit: at 36.8mm lug-to-lug it should sit within the top of wrists from about 12.3cm up (rule of thumb: lug-to-lug under ~30% of wrist size). That's longer than 0% of the watches in our index. See what size watch suits your wrist.
- Strap thickness: at 8.2mm thick it's a slim case: thin leather (about 2.5–3mm) or a single-pass strap keeps it low; a regular NATO adds 1–2mm underneath.
Sources & corrections
Lug width checked against: Jam Tangan: A158WA-1DF specifications. Last checked 24 October 2026.
Spec wrong for your watch? Send us a correction with your reference number.
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Casio A158WA — strap questions
What size strap does the A158WA take?
The Casio A158WA has a 18mm lug width, so you need a 18mm watch strap.
Will any 18mm strap fit the A158WA?
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 18mm end-links made for this model.
What spring bar size does the A158WA use?
18mm long. We haven't confirmed the diameter for the A158WA, so measure the original bar with calipers before buying replacements.
Is the A158WA good for strap swapping?
Yes. With standard 18mm spring-bar lugs, NATO, leather, rubber and mesh straps can all be fitted with a spring-bar tool.