Sinn
Sinn U1 Strap Size — 22mm Lug Width
The Sinn U1 has a 22mm lug width, so it takes a 22mm watch strap.
Lug width22mm
| Lug width | 22 mm |
|---|---|
| Case size | 44 mm |
| Lug-to-lug | 47 mm |
| Thickness | 14.7 mm |
| Spring bar Ø (typical) | 2.5 mm |
| End type | Straight |
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 / siliconePick straps with holes made for fat bars.
- Milanese / meshStraight-end 22mm mesh fits.
- Metal braceletNeeds 22mm end-links shaped for this case.
Fit & sizing notes for the U1
- 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, about 2.5mm diameter. These are fat bars, so pick straps with holes made for them, or swap to thinner 22mm bars for slim leather (spring bar sizes).
- 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 14.7mm 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 from widely published specifications. Case sizes and references vary, so measure your own watch if anything looks different.
Spec wrong for your watch? Send us a correction with your reference number.
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Sinn U1 — strap questions
What size strap does the U1 take?
The Sinn U1 has a 22mm lug width, so you need a 22mm watch strap.
Will any 22mm strap fit the U1?
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 U1 use?
22mm long and about 2.5mm in diameter (a typical figure; measure the original bar to be sure). These are thicker 'fat' bars, so heavier straps suit it best.
Is the U1 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.