Hamilton
Hamilton Jazzmaster Strap Size — 20mm Lug Width
The Hamilton Jazzmaster has a 20mm lug width, so it takes a 20mm watch strap.
Lug width20mm
| Lug width | 20 mm |
|---|---|
| Case size | 40 mm |
| Lug-to-lug | 47 mm |
| Thickness | 11 mm |
| Spring bar Ø (typical) | 1.8 mm |
| End type | Fitted ends best |
Strap styles that fit
- NATO / Zulu20mm fits if the strap's thickness clears the case under the bars.
- PerlonWoven pass-through, 20mm.
- 2-piece leatherStraight ends fit; curved ends for a gapless look.
- Rubber / siliconeDivers & sports fit well.
- Milanese / meshStraight-end 20mm mesh fits.
- Metal braceletNeeds 20mm end-links shaped for this case.
Fit & sizing notes for the Jazzmaster
- Width: buy 20mm straps. Tapered straps listed as 20/18mm or 20/16mm fit too; only the first number has to match. See strap sizes explained.
- Spring bars: 20mm long, about 1.8mm diameter (spring bar sizes).
- Ends: the case curves between the lugs, so curved or fitted-end straps close the gap. Straight-end straps still fit.
- Wrist fit: at 47mm lug-to-lug it should sit within the top of wrists from about 15.7cm up (rule of thumb: lug-to-lug under ~30% of wrist size). That's longer than 36% of the watches in our index. See what size watch suits your wrist.
- Strap thickness: at 11mm thick it's mid-thickness, so most straps suit it; padded leather and NATOs both balance well.
Sources & corrections
Lug width checked against: WatchBase: H32475130. Last checked 24 October 2026.
Spec wrong for your watch? Send us a correction with your reference number.
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Hamilton Jazzmaster — strap questions
What size strap does the Jazzmaster take?
The Hamilton Jazzmaster has a 20mm lug width, so you need a 20mm watch strap.
Will any 20mm strap fit the Jazzmaster?
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. For a gapless look, pick curved/fitted ends. A metal bracelet needs 20mm end-links made for this model.
What spring bar size does the Jazzmaster use?
20mm long and about 1.8mm in diameter (a typical figure; measure the original bar to be sure).
Is the Jazzmaster good for strap swapping?
Yes. With standard 20mm spring-bar lugs, NATO, leather, rubber and mesh straps can all be fitted with a spring-bar tool.