Every reference with a known width takes the same strap size. Your reference is engraved on the case back or between the lugs at 6 o'clock.
18 mm
Verification: From our database, not yet verified
31 mm case
Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size.
The Cartier Santos-Dumont Large takes a 18 mm strap: all 3 references with a listed width in our database use 18 mm. Check the reference on your case back to be sure.
Cartier Santos-Dumont Large references in our database. Each card says where its width comes from: listed by the maker (linked to the maker's page in the details), two independent sources agree, or listed in our database and not yet verified by us.
Santos-Dumont Large Pink Gold
Lug width: 18 mm
Source: DatabaseCase size: 31 mmSilver dialCase material: Rose Gold
Santos-Dumont Large Steel Silver Dial
Lug width: 18 mm
Source: DatabaseCase size: 31 mmSilver dialCase material: Steel
Santos-Dumont Large Steel/Gold
Lug width: 18 mm
Source: DatabaseCase size: 31 mmSilver dialCase material: Yellow Gold
No reference matches.
The Cartier Santos-Dumont Large takes a 18 mm strap: all 3 references with a listed width in our database use 18 mm. Check the reference on your case back to be sure. These widths come from our database and are not yet verified.
From our database, which lists 3 Cartier Santos-Dumont Large references, 3 of them with a listed width. Each reference card says whether the maker lists the width, two independent sources agree on it, or it is not yet verified.
The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.
Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.