Rolex Day-Date strap size & fit guide: lug width, versions and what fits
Updated November 2026 · Facts below are taken from Lugline product data for the Rolex Day-Date.
Short answer: Lugline makes 116 straps for the Rolex Day-Date in 20 mm / 21 mm lug widths, with curved ends, shaped to sit flush against the case. Prices start at $102. The right width depends on which version you own – see the table below.
Which Rolex Day-Date strap size do I need?
Lugline straps are made per watch version. Match the version printed on your product page to the lug width below.
| Watch version (as listed on Lugline) | Lug width of the strap | Straps available |
|---|---|---|
| Rolex Day-Date 36mm | 20 mm | 42 |
| Rolex Day-Date 40 | 20 mm | 37 |
| Rolex Day-Date II 41mm | 21 mm | 37 |
Not sure which version you have? Use the Strap Finder (brand → model → reference) or read how to measure lug width.
What kind of strap end fits the Rolex Day-Date?
Curved-end straps (116 straps) are shaped to follow the case so there is no gap between strap and lugs.
Can I keep my original buckle or clasp?
Yes. Most Lugline Rolex Day-Date straps offer a No Buckle option, so you can fit your own pin buckle. If you want a new one, the buckle options on these straps are: Silver, Black, Gold, Rose Gold, Silver Deployant.
How long are the straps?
Strap lengths listed on Lugline product pages for this model (long piece + short piece): 125 mm + 75 mm (116 straps).
Materials and prices
Materials across the 116 Rolex Day-Date straps: Rubber (116). Prices range from $102 to $127. Browse all in straps compatible with Rolex Day-Date.
Popular Lugline straps for the Rolex Day-Date
Deployant Rubber Strap, Baby Blue – compatible with Rolex Day-Date 36mm20 mm$102
Deployant Rubber Strap, Baby Blue – compatible with Rolex Day-Date 4020 mm$102
Deployant Rubber Strap, Beige – compatible with Rolex Day-Date 4020 mm$102
Deployant Rubber Strap, Black – compatible with Rolex Day-Date 4020 mm$102
FAQ
What lug width does the Rolex Day-Date use?
Lugline Rolex Day-Date straps are made in 20 mm / 21 mm, depending on the version. See the version table above to match yours.
Do Lugline Rolex Day-Date straps come with spring bars?
Spring bars are included with Lugline straps, so no watchmaker is needed to swap them.
Can I use my original buckle with a Lugline Rolex Day-Date strap?
Yes. Choose the No Buckle option and fit your own pin buckle.
Will a curved-end strap leave a gap on my Rolex Day-Date?
No. Curved ends are shaped to the case of the listed versions, so the strap sits flush against the lugs.
Is a watch included?
No. Lugline sells straps only. Brand and model names are used to describe compatibility; Lugline is independent and not affiliated with any watch manufacturer.
How do I return a Rolex Day-Date strap that does not fit?
Unworn straps in original packaging can be returned within 30 days of delivery. Use the Strap Finder or email support with your reference before ordering if unsure.
Related guides
Shop straps for Rolex Day-Date · Open the Strap Finder
Brand and model names are used only to describe compatibility. Lugline is an independent brand and is not affiliated with, endorsed by or sponsored by any watch manufacturer. Watch not included.