Rolex
Rolex Oyster Perpetual 41 Strap Size — 21mm Lug Width
The Rolex Oyster Perpetual 41 has a 21mm lug width, so it takes a 21mm watch strap.
Lug width21mm
| Lug width | 21 mm |
|---|---|
| Case size | 41 mm |
| Lug-to-lug | 47.5 mm |
| Thickness | 12 mm |
| Spring bar Ø (typical) | 2.0 mm |
| End type | Fitted ends best |
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 |
|---|---|---|
| 124300 | 41mm, 2020 on | 21mm |
| Datejust 41 (126300) | 41mm | 21mm |
| Datejust 36 (126200) | 36mm | 20mm |
Strap styles that fit
- NATO / Zulu21mm fits if the strap's thickness clears the case under the bars.
- PerlonWoven pass-through, 21mm.
- 2-piece leatherStraight ends fit; curved ends for a gapless look.
- Rubber / siliconeDivers & sports fit well.
- Milanese / meshStraight-end 21mm mesh fits.
- Metal braceletNeeds 21mm end-links shaped for this case.
▲ 21mm — few straps are made in 21mm.
Fit & sizing notes for the Oyster Perpetual 41
- Width: buy 21mm straps. Tapered straps listed as 21/19mm or 21/17mm fit too; only the first number has to match. See strap sizes explained.
- Spring bars: 21mm long, about 2.0mm diameter (spring bar sizes).
- Odd size: 21mm straps are harder to find; a 20mm strap fits with a small gap, but never go wider. Odd lug width options.
- Ends: the case curves between the lugs, so curved or fitted-end straps close the gap. Straight-end straps still fit.
- Wrist fit: at 47.5mm lug-to-lug it should sit within the top of wrists from about 15.8cm up (rule of thumb: lug-to-lug under ~30% of wrist size). That's longer than 55% of the watches in our index. See what size watch suits your wrist.
- Strap thickness: at 12mm thick it's mid-thickness, so most straps suit it; padded leather and NATOs both balance well.
Sources & corrections
Correction, 24 October 2026: This page previously listed 20mm. The Oyster Perpetual 41 (124300) is 21mm.
Lug width checked against: WatchBase: 124300; Bernard Watch: 124300. Last checked 24 October 2026.
Spec wrong for your watch? Send us a correction with your reference number.
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Rolex Oyster Perpetual 41 — strap questions
What size strap does the Oyster Perpetual 41 take?
The Rolex Oyster Perpetual 41 has a 21mm lug width, so you need a 21mm watch strap.
Will any 21mm strap fit the Oyster Perpetual 41?
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 21mm end-links made for this model.
What spring bar size does the Oyster Perpetual 41 use?
21mm long and about 2.0mm in diameter (a typical figure; measure the original bar to be sure).
Is the Oyster Perpetual 41 good for strap swapping?
Yes. With standard 21mm spring-bar lugs, NATO, leather, rubber and mesh straps can all be fitted with a spring-bar tool.