Straps & sizing · updated November 2026

Cartier size chart

Case size, thickness and water resistance for every current Cartier reference we track, sortable and searchable.

The short answer

Cartier doesn't publish lug width on most of the product pages we checked, so this chart covers case size instead. The most common Cartier case diameter in our data is 22 mm (12 of 118 references); sizes run from 15.2 mm to 42 mm. Measure your watch's lug gap before buying a strap.

By collection

Collection	Case sizes	Refs
Santos de Cartier	27.5 / 31.4 / 33.9 / 35.1 / 37.7 / 39.7 / 39.8 mm	36
Tank	15.2 / 16.5 / 19.4 / 21.2 / 22 / 24.4 / 25.5 / 27… mm	33
Panthère de Cartier	18.5 / 22 / 26.7 / 31 / 41 mm	20
Ballon de Cartier	28 / 33 / 36 / 37 / 42 mm	19
Baignoire	18.7 / 20.7 / 23.1 mm	7
Panthère jewelry watches	22.2 mm	2
Tortue	34.8 mm	1

Case sizes at a glance

15.2 mm 5
16.5 mm 1
18.5 mm 4
18.7 mm 1
19.4 mm 5
20.7 mm 2
21.2 mm 4
22 mm 12
22.2 mm 2
23.1 mm 4
24.4 mm 4
25.5 mm 5
26.7 mm 5
27 mm 2
27.5 mm 3
28 mm 1

Every current Cartier reference


WGBA0040 Black lacquered	Baignoire	18.7 mm	7.5 mm	30 m	Leather strap	$9,550
WJBA0006 Silver 925/1000	Baignoire	20.7 mm	8.36 mm	30 m	–	$51,500
WJBA0007 Silvered	Baignoire	20.7 mm	8.36 mm	30 m	–	$55,000
WGBA0042 Silvered	Baignoire	23.1 mm	6.97 mm	30 m	Alligator leather strap	$13,900
WJBA0049 Silver 925/1000	Baignoire	23.1 mm	7.27 mm	30 m	–	$36,600
WJBA0053 Silvered	Baignoire	23.1 mm	7.25 mm	30 m	Alligator leather strap	$23,300
WJBA0054 Silvered	Baignoire	23.1 mm	7.25 mm	30 m	Alligator leather strap	$23,300
WSBB0073 Silvered opaline	Ballon de Cartier	28 mm	9.35 mm	30 m	Bracelet	$5,750
W2BB0037 Silvered guilloché	Ballon de Cartier	33 mm	10.5 mm	30 m	Strap	$11,500
W4BB0021	Ballon de Cartier	33 mm	10.5 mm	30 m	Bracelet	$8,800
W4BB0023 Silver guilloché	Ballon de Cartier	33 mm	10.5 mm	30 m	Bracelet	$13,600
W6920097 Silvered guilloché lacquered opaline	Ballon de Cartier	33 mm	10.5 mm	30 m	–	$15,900
WGBB0052	Ballon de Cartier	33 mm	10.5 mm	30 m	–	$18,200
WJBB0033	Ballon de Cartier	33 mm	10.5 mm	30 m	Alligator leather strap	$25,700
WJBB0080	Ballon de Cartier	33 mm	10.5 mm	30 m	Alligator leather strap	$28,300
WSBB0030 Silver guilloché opaline	Ballon de Cartier	33 mm	10.5 mm	30 m	Alligator leather strap	$6,600
WSBB0044 Silver guilloché	Ballon de Cartier	33 mm	10.5 mm	30 m	Bracelet	$7,050
WSBB0062 Blue silvered sunray-brushed	Ballon de Cartier	33 mm	10.5 mm	30 m	Bracelet	$7,050
WSBB0068 Pink sunray	Ballon de Cartier	33 mm	10.5 mm	30 m	Bracelet	$7,050
W2BB0038 Silvered guilloché	Ballon de Cartier	36 mm	12.06 mm	30 m	Strap	$12,800
WSBB0048 Silver guilloché	Ballon de Cartier	36 mm	12.06 mm	30 m	Bracelet	$7,500
HPI01514	Ballon de Cartier	37 mm	13.17 mm	30 m	Bracelet	$247,000
HPI01515	Ballon de Cartier	37 mm	13.17 mm	30 m	Alligator leather strap	$163,000
WGBB0030 Silver guilloché lacquered opaline	Ballon de Cartier	42 mm	13.03 mm	30 m	Alligator leather strap	$20,500
WSBB0026 Silver guilloché opaline	Ballon de Cartier	42 mm	13.03 mm	30 m	Alligator leather strap	$7,950
WSBB0049 Silver guilloché	Ballon de Cartier	42 mm	13.03 mm	30 m	Bracelet	$8,500
HPI01719 Silver	Panthère de Cartier	18.5 mm	5.74 mm	30 m	Bracelet	$94,500
WGPN0048 Silver	Panthère de Cartier	18.5 mm	5.74 mm	30 m	Bracelet	$24,800
WJPN0070 Silver	Panthère de Cartier	18.5 mm	5.74 mm	30 m	Strap	$39,800
WSPN0012 Silver	Panthère de Cartier	18.5 mm	5.74 mm	30 m	Bracelet	$4,450
W4PN0016 Silvered	Panthère de Cartier	22 mm	6.05 mm	30 m	Bracelet	$9,250
WGPN0046 Silvered	Panthère de Cartier	22 mm	6.05 mm	30 m	Bracelet	$44,600
WJPN0049 Silvered	Panthère de Cartier	22 mm	6.05 mm	30 m	Bracelet	$33,400
WJPN0057	Panthère de Cartier	22 mm	6.05 mm	30 m	Bracelet	$34,500
WJPN0058	Panthère de Cartier	22 mm	6.05 mm	30 m	Bracelet	$34,500
WJPN0069 Silvered	Panthère de Cartier	22 mm	6.05 mm	30 m	Bracelet	$50,500
WSPN0013 Silvered	Panthère de Cartier	22 mm	6.05 mm	30 m	Bracelet	$5,300
HPI01721	Panthère de Cartier	26.7 mm	6.53 mm	30 m	Bracelet	$181,000
HPI01722	Panthère de Cartier	26.7 mm	6.44 mm	30 m	Bracelet	$150,000
W4PN0018 Silvered	Panthère de Cartier	26.7 mm	6.44 mm	30 m	Bracelet	$10,700
WJPN0093	Panthère de Cartier	26.7 mm	6.83 mm	30 m	Bracelet	$41,000
WSPN0015 Silvered	Panthère de Cartier	26.7 mm	6.44 mm	30 m	Bracelet	$6,250
W2PN0016 Silvered	Panthère de Cartier	31 mm	6.71 mm	30 m	Bracelet	$12,400
WGPN0051 Silvered	Panthère de Cartier	31 mm	6.71 mm	30 m	Bracelet	$36,100
WSPN0016 Silvered	Panthère de Cartier	31 mm	6.71 mm	30 m	Bracelet	$6,950
HPI01359 18K yellow gold (750/1000)	Panthère de Cartier	41 mm	9.9 mm	30 m	Strap	$154,000
HPI01453	Panthère jewelry watches	22.2 mm	7.55 mm	30 m	Strap	$278,000
HPI01454	Panthère jewelry watches	22.2 mm	7.55 mm	30 m	Strap	$278,000
W2SA0038	Santos de Cartier	27.5 mm	7.3 mm	30 m	–	$6,850
WGSA0117	Santos de Cartier	27.5 mm	7.3 mm	30 m	–	$13,200
WSSA0086	Santos de Cartier	27.5 mm	7.3 mm	30 m	–	$4,800
W2SA0036	Santos de Cartier	31.4 mm	7.3 mm	30 m	Alligator leather strap	$7,350
WGSA0115	Santos de Cartier	31.4 mm	7.3 mm	30 m	Alligator leather strap	$15,200
WGSA0116	Santos de Cartier	31.4 mm	7.3 mm	30 m	–	$15,200
WHSA0030	Santos de Cartier	31.4 mm	8 mm	30 m	Alligator leather strap	$44,500
WHSA0032	Santos de Cartier	31.4 mm	8 mm	30 m	Alligator leather strap	$34,100
WSSA0046	Santos de Cartier	31.4 mm	7.3 mm	30 m	Alligator leather strap	$8,550
WSSA0085	Santos de Cartier	31.4 mm	7.3 mm	30 m	–	$5,250
WSSA0032	Santos de Cartier	33.9 mm	7.5 mm	30 m	Alligator leather strap	$7,800
W2SA0016 Silvered opaline	Santos de Cartier	35.1 mm	8.82 mm	100 m	Bracelet	$12,900
W3SA0007 Golden sunray	Santos de Cartier	35.1 mm	8.82 mm	100 m	Bracelet	$19,300
W4SA0005	Santos de Cartier	35.1 mm	8.82 mm	100 m	Bracelet	$15,800
WGSA0028 Opaline silver	Santos de Cartier	35.1 mm	8.82 mm	100 m	Alligator leather strap	$20,900
WGSA0030 Silvered opaline	Santos de Cartier	35.1 mm	8.82 mm	100 m	Bracelet	$42,900
WJSA0014 Sunray-effect	Santos de Cartier	35.1 mm	8.82 mm	100 m	Alligator leather strap	$55,500
WSSA0029 Silvered opaline	Santos de Cartier	35.1 mm	8.82 mm	100 m	Bracelet	$8,400
WSSA0061 Graduated green	Santos de Cartier	35.1 mm	8.82 mm	100 m	Bracelet	$8,400
WSSA0063 Graduated blue	Santos de Cartier	35.1 mm	8.82 mm	100 m	Bracelet	$8,400
W2SA0035	Santos de Cartier	37.7 mm	11.6 mm	100 m	–	$18,300
WGSA0110	Santos de Cartier	37.7 mm	11.6 mm	100 m	–	$73,500
WSSA0076 Satin-finish anthracite gray sunray-brushed	Santos de Cartier	37.7 mm	10.1 mm	100 m	Bracelet	$11,100
WSSA0083	Santos de Cartier	37.7 mm	11.6 mm	100 m	–	$14,700
WHSA0015	Santos de Cartier	39.7 mm	9.08 mm	100 m	Bracelet	$33,500
WHSA0016	Santos de Cartier	39.7 mm	9.08 mm	100 m	Bracelet	$77,000
WHSA0028	Santos de Cartier	39.7 mm	9.08 mm	100 m	Bracelet	$34,700
W2SA0009 Silvered opaline	Santos de Cartier	39.8 mm	9.38 mm	100 m	Bracelet	$14,200
W2SA0030	Santos de Cartier	39.8 mm	9.38 mm	100 m	Bracelet	$14,200
WGSA0018 Silvered opaline	Santos de Cartier	39.8 mm	9.38 mm	100 m	Bracelet	$48,800
WGSA0019 Opaline silver	Santos de Cartier	39.8 mm	9.38 mm	100 m	Alligator leather strap	$25,000
WGSA0029 Silvered opaline	Santos de Cartier	39.8 mm	9.38 mm	100 m	Bracelet	$48,800
WSSA0018 Silvered opaline	Santos de Cartier	39.8 mm	9.38 mm	100 m	Bracelet	$9,200
WSSA0039 Black	Santos de Cartier	39.8 mm	9.38 mm	100 m	Rubber strap	$9,850
WSSA0062 Graduated green	Santos de Cartier	39.8 mm	9.38 mm	100 m	Bracelet	$9,200
WSSA0071 Graduated blue	Santos de Cartier	39.8 mm	9.38 mm	100 m	Bracelet	$9,200
WGTA0341 Silvered sunray	Tank	15.2 mm	6.52 mm	30 m	Alligator leather strap	$9,900
WGTA0353	Tank	15.2 mm	6.52 mm	30 m	Alligator leather strap	$9,900
WJTA0057 Silvered sunray	Tank	15.2 mm	6.52 mm	30 m	Bracelet	$32,600
WJTA0060 Silvered sunray	Tank	15.2 mm	6.52 mm	30 m	Strap	$74,000
WSTA0116 Silvered sunray	Tank	15.2 mm	6.52 mm	30 m	Alligator leather strap	$3,850
WGTA0352 Grained silvered	Tank	16.5 mm	6.05 mm	30 m	Alligator leather strap	$9,300
WGTA0340 Silvered satin-brushed	Tank	19.4 mm	6.76 mm	30 m	Alligator leather strap	$14,100
WGTA0356 Silvered satin-brushed	Tank	19.4 mm	6.76 mm	30 m	Alligator leather strap	$14,100
WJTA0056 Silvered satin-brushed	Tank	19.4 mm	6.76 mm	30 m	Bracelet	$38,400
WJTA0059 Silvered satin-brushed	Tank	19.4 mm	6.76 mm	30 m	Alligator leather strap	$24,200
WSTA0117 Silvered satin-brushed	Tank	19.4 mm	6.76 mm	30 m	Alligator leather strap	$4,600
W4TA0029 Silvered sunray	Tank	21.2 mm	6.79 mm	30 m	Bracelet	$9,650
WGTA0344 Golden sunray	Tank	21.2 mm	6.79 mm	30 m	–	$27,700
WJTA0062 Golden sunray	Tank	21.2 mm	6.79 mm	30 m	–	$35,700
WSTA0129 Silvered sunray	Tank	21.2 mm	6.79 mm	30 m	Bracelet	$4,450
W4TA0031 Silvered	Tank	22 mm	6.6 mm	30 m	Strap	$6,800
WGTA0010 Silvered beaded	Tank	22 mm	6.62 mm	30 m	–	$14,200
WGTA0342 Silver-grained	Tank	22 mm	6.35 mm	30 m	Alligator leather strap	$12,400
WSTA0107 Silvered	Tank	22 mm	6.6 mm	30 m	Bracelet	$4,100
WSTA0121 Silvered	Tank	22 mm	6.6 mm	30 m	Bracelet	$4,100
WGTA0134 Satin-brushed silvered	Tank	24.4 mm	8.54 mm	30 m	Alligator leather strap	$20,300
WGTA0296	Tank	24.4 mm	8.54 mm	30 m	Alligator leather strap	$28,300
WGTA0300 Silvered satin-brushed	Tank	24.4 mm	8.54 mm	30 m	Alligator leather strap	$20,300
WSTA0083 Silvered satin-brushed	Tank	24.4 mm	8.54 mm	30 m	Alligator leather strap	$7,100
WGTA0011 Silvered beaded	Tank	25.5 mm	6.6 mm	30 m	–	$15,800
WGTA0343 Grained silvered	Tank	25.5 mm	6.33 mm	30 m	–	$13,900
WSTA0106 Silvered	Tank	25.5 mm	6.6 mm	30 m	Bracelet	$4,400
WSTA0108 Black lacquered	Tank	25.5 mm	6.6 mm	30 m	Alligator leather strap	$4,100
WSTA0122 Silvered	Tank	25.5 mm	6.6 mm	30 m	Bracelet	$4,400
W4TA0028 Silvered sunray	Tank	27 mm	7.08 mm	30 m	Bracelet	$11,100
WSTA0105 Silvered	Tank	27 mm	7.08 mm	30 m	Bracelet	$5,700
WSTA0067 Silvered	Tank	30.5 mm	10.11 mm	30 m	Bracelet	$6,950
WSTA0053 Silvered flinqué	Tank	31 mm	8.37 mm	30 m	Bracelet	$6,050
WHTO0012	Tortue	34.8 mm	10.23 mm	30 m	–	$65,000

Click a column heading to sort. n/p = not published by the brand on the page we checked.

How case size wears

As a rough guide, a case of about 23.5% of your wrist circumference suits most people, and lug-to-lug matters more than diameter on smaller wrists. Each reference page has a wrist-fit estimate, and Watch Finder filters by wrist size.

Which strap type?

Rubber or silicone: the practical choice for swimming and hot weather. It doesn't absorb water and rinses clean.
Fabric single-pass or two-piece nylon: light and cheap. A single-pass strap runs under the case, which adds a little height on the wrist.
Leather: dressier, but water and sweat shorten its life. Keep it off dive watches you actually swim with.
Steel bracelet: the most durable, but aftermarket bracelets need end links shaped for the specific case, which brands rarely publish. Buy one listed for your exact reference.

Spring bars and changing straps

The length of the spring bar has to match the lug width. Cartier product pages we checked don't publish spring-bar diameter, so measure your existing bars or check the hole size listed for any aftermarket strap. Some bracelets use fitted end links shaped to one case; if yours does, an aftermarket strap may leave a gap at the lugs. If a bar is seized or the case has no visible lug gap, a watchmaker can swap the strap safely. Step-by-step instructions are in our spring bars and tools guide; the method is the same for any brand.

Questions

What is the most common Cartier case size?

22 mm, on 12 of the 118 current Cartier references we track.

Does Cartier publish lug width?

Not on most of the product pages we checked. Measure the inside gap between the lugs in millimetres, or ask the seller for the width.

Where do these numbers come from?

From Cartier's own product pages. Each reference page links its source and the date we checked it.

Not sure? Try Watch Finder →

Watch.co is independent and not affiliated with any brand. We haven't handled these watches for this page: everything here comes from brand-published specs and our own analysis. Brand names are used only to identify products.