Rolex · Datejust 31
Strap for Rolex Datejust 31 178383
The Rolex Datejust 31 178383 takes 16 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
- 4.8 out of 5 · 269 reviews
- Ships in 1–3 working days
- Worldwide shipping
- 30-day returns
- 12-month warranty on manufacturing defects
- Hand-stitched in Milan
Lug width

Straps for the Datejust 31 178383
Selected for the 16 mm lug width
What length do I need?
Measure your wrist with a tailor's tape or a piece of string, comfortably snug.
| Wrist circumference | Length (long side / short side) |
|---|---|
| 15.0–16.4 cm | 120 / 70 mm |
| 16.5–17.8 cm | 125 / 75 mm |
| 17.9–19.0 cm | 130 / 80 mm |
| 19.1–20.3 cm | 135 / 85 mm |
| 20.4–21.6 cm | 140 / 85 mm |
| 21.7–22.9 cm | 145 / 90 mm |
The ready-to-wear strap is 115 × 75 mm. For a smaller or larger wrist I make it in the right length: order your length.
What I'm asked about the Rolex Datejust 31 178383
What strap size does the Rolex Datejust 31 178383 take?
The Rolex Datejust 31 178383 needs 16 mm between the lugs. It's the size I've been fitting on it for years.
Can the strap on the Rolex Datejust 31 178383 be changed?
Yes. It has spring bars between the lugs: with the right tool the strap comes off in a minute. If you'd rather not risk a scratch, I do it in the workshop.
Can I put a leather strap on the Rolex Datejust 31 178383?
Yes, in 16 mm leather. On a 31 mm case a calf strap works every day; if you want something more, alligator.
Which strap do you recommend for the Rolex Datejust 31 178383?
A 16 mm calf strap, for every day. You'll find it ready in the 16 mm collection. If you'd rather have something built on your wrist, the Casati atelier.
More Rolex in 16 mm
- Oyster Perpetual 31 Stainless Steel / BlackOyster Perpetual 31
- Rolex Oyster Perpetual 100th - 31mmOyster Perpetual 100th - 31mm
- Cellini Prince White Gold / SilverCellini
- Cellini Prince Everose Gold / BlackCellini
- Rolex Bubbleback 9290Bubbleback
- Rolex Bubbleback 9291Bubbleback
For changing the strap
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only
Bespoke straps for Rolex, in the atelier or by video call: casatimilano.com

