Cartier Rotonde de Cartier

Most Cartier Rotonde de Cartier references take a 18 mm watch strap: 16 of 27. The lug width follows the case size: 40 mm case → 18 mm, 42 mm case → 20 mm, 44 mm case → 18 mm and 45 mm case → 18 mm.

Shop 18 mm Shop 20 mm Shop 22 mm

Cartier Rotonde de Cartier lug width by case size

27 references measured; 7 more have an integrated bracelet. Updated 2026-10-29.

Case	Lug width	References	Watch strap attachment	For example
40 mm	18 mm · 20 mm on 3 · 22 mm on 1	11	—	HPI00593, W1556217, W1556218
42 mm	20 mm · 18 mm on 1 · 23 mm on 1	5	—	HPI00636, W1556223, W1556224
43 mm	18 mm	1	—	W1556243
44 mm	18 mm · 20 mm on 1	4	—	HPI00890, HPI01073, W1556249
45 mm	18 mm · 20 mm on 1	3	—	W1556244, W1580001
47 mm	18 mm · 20 mm on 1	3	—	W1556222, WHRO0013

References that take a different watch strap

W1556215: 20 mm, not the 18 mm of most 40 mm cases
W1556216: 20 mm, not the 18 mm of most 40 mm cases
W1556238: 22 mm, not the 18 mm of most 40 mm cases
WHRO0003: 20 mm, not the 18 mm of most 40 mm cases
W1556241: 18 mm, not the 20 mm of most 42 mm cases
W1556368: 23 mm, not the 20 mm of most 42 mm cases
HPI00889: 20 mm, not the 18 mm of most 44 mm cases
W1580002: 20 mm, not the 18 mm of most 45 mm cases
HPI00639: 20 mm, not the 18 mm of most 47 mm cases

Questions about the Cartier Rotonde de Cartier

Do all Cartier Rotonde de Cartier case sizes take the same watch strap?

No. The lug width changes with the case size: the 40 mm case takes 18 mm and the 42 mm case takes 20 mm. Check your case diameter before you buy.

Can two Cartier Rotonde de Cartier watches with a 40 mm case take different watch straps?

Yes. Of the 11 Cartier Rotonde de Cartier references with a 40 mm case, 7 take 18 mm, 3 take 20 mm and 1 take 22 mm. The reference number decides, not the case size alone.