The Cartier Santos-Dumont XL WSSA0032 is the one enthusiasts talk about. Launched in 2020, it gave the elegant Santos-Dumont case a proper hand-wound manufacture movement — the calibre 430 MC — inside a 46.6 x 33.9 mm profile just 7.5 mm thin. The silvered sunray dial, blued sword hands, and blue spinel cabochon complete a watch that feels like vintage Cartier built to modern standards. It ships on a navy blue alligator strap with a pin buckle, and that is the whole story of ownership: this is a pure strap watch, and the strap will need replacing long before anything else does.
This guide covers the correct strap size for the WSSA0032 and the most popular Helvetus options for it.
Cartier Santos-Dumont XL WSSA0032 Strap Size and Fit
For the Cartier Santos-Dumont XL WSSA0032:
- Model: Santos-Dumont, extra-large model
- Case size: 46.6 mm x 33.9 mm, thickness 7.5 mm
- Attachment: standard spring bars
- Strap width at the case: 19 mm
This means the watch requires a 19mm strap. When ordering, simply select the 19mm option on the product page.
For clarity across the whole line: the Santos-Dumont Small takes 15.5mm, the Large takes 18mm, and the XL — this reference — takes 19mm. The sizes are close enough to mix up, so double-check which model you own before ordering.
Proportion matters just as much on a case this thin. Helvetus Santos-Dumont straps are shaped to sit flush with the slim case and its distinctive lug design, with quick-release spring bars included so changes take seconds.
Thin Watch, Big Personality
The Santos-Dumont XL exists because collectors asked for it: the refined Dumont case, finally with a mechanical heart. At 7.5 mm it slides under any cuff, and the hand-wound movement makes winding it each morning part of the ritual.
Which makes the strap decision more interesting than on any other Dumont. The navy alligator it comes on is beautiful — and worth preserving. Rotating to a second strap protects the original, and it unlocks the look that made this exact watch a favorite on enthusiast wrists: a slim, formal Cartier on fitted rubber. The contrast shouldn't work, and it absolutely does.
The Best Straps for the Cartier Santos-Dumont XL WSSA0032
Helvetus offers leather straps and CTS rubber straps made from FKM rubber, all designed for the Santos-Dumont line. You can browse every compatible option here: Cartier Santos-Dumont Strap Collection.
Below are the most popular choices among owners of this reference, matched to its silvered sunray dial, blued hands, and steel case.
Black CTS Rubber Strap
The modern-classic move. Black FKM rubber turns the XL into a thin, wearable everyday watch — dressy from across the room, completely relaxed up close. This is the swap that made the hand-wound Dumont a daily driver for so many owners. Black CTS Rubber Strap for Cartier Santos-Dumont
Grey CTS Rubber Strap
Grey builds a tonal, silver-on-silver look with the sunray dial and polished case. It keeps the watch understated and refined while adding all the practicality of rubber — the quiet favorite among owners who wear the XL to the office. Grey CTS Rubber Strap for Cartier Santos-Dumont
White CTS Rubber Strap
White completely changes the personality of the Santos-Dumont. Against the silvered dial it looks fresh, modern, and made for summer — while the Roman numerals and blued hands keep it unmistakably Cartier. White CTS Rubber Strap for Cartier Santos-Dumont
Green CTS Rubber Strap
Green against silver and steel is the current combination, and the slim XL case wears it with real confidence. The pick for owners who want their hand-wound classic to feel like this year's release. Green CTS Rubber Strap for Cartier Santos-Dumont
If you want to stay in the family of the original navy strap, the Light Blue CTS Rubber Strap picks up the blued hands and spinel crown in a lighter register — and classic leather options in black, blue, and brown are in the collection as well.
Final Thoughts
The WSSA0032 is the Santos-Dumont at its most complete — mechanical, razor-thin, and quietly confident. With the right 19mm strap in rotation, it covers everything from black tie to a Sunday in the sun while the original alligator stays safe in the box.
Helvetus is a leading name in aftermarket straps for luxury watches, trusted by more than 50,000 customers worldwide. Every Santos-Dumont strap is made for a precise fit on this case, rubber straps are covered by a lifetime warranty, and all orders ship free worldwide with no import costs.
Find the perfect strap for your Santos-Dumont XL WSSA0032 in the Cartier Santos-Dumont Strap Collection.
