Sizes of Swiss and American watches

by John
November 20, 2015November 20, 2015

Sizes of American watches

One legne = 2.258 mm

One inch = 25.4 mm

Size	mm	Size	mm
18	45.7	6/0	25.4
16	43.1	8/0	23.7
14	41.5	10/0	22.0
12	39.8	12/0	20.31
10	38.1	14/0	18.6
8	36.4	15/0	17.8
6	34.7	16/0	16.9
4	33.0	18/0	15.2
0	29.6	20/0	13.5
3/0	27.9	21/0	12.7
4/0	27.09	22/0	11.8
5/0	26.2	26/0	8.5

Sizes of Swiss watches

Lignes	mm	Lignes	mm
3	6.77	11¾	26.51
3¼	7.38	12	27.07
31⁄2	7.87	12¼	27.63
3¾	8.42	121⁄2	28.20
4	9.03	12¾	28.79
4¼	9.59	13	29.33
4¹⁄2	10.15	13¼	29.89
4¾	10.72	13¹⁄2	30.45
5	11.28	13¾	31.02
5¼	11.84	14	31.58
5¹⁄2	12.40	14¼	32.15
5¾	12.97	14¹⁄2	32.71
6	13.53	14¾	33.27
6¼	14.10	15	33.84
6¹⁄2	14.66	15¼	34.40
6¾	15.23	15¹⁄2	34.98
7	15.79	15¾	35.53
7¼	16.35	16	36.09
7¹⁄2	16.92	16¼	36.66
7¾	17.48	16¹⁄2	37.22
8	18.05	16¾	37.78
8¼	18.61	17	38.35
8¹⁄2	19.17	17¼	38.91
8¾	19.74	17¹⁄2	39.48
9	20.30	17¾	40.04
9¼	20.87	18	40.60
9¹⁄2	21.43	18¼	41.17
9¾	21.99	18¹⁄2	41.73
10	22.56	18¾	42.30
10¼	23.14	19	42.86
10¹⁄2	23.69	19¼	43.42
10¾	24.45	19¹⁄2	43.99
11	24.81	19¾	44.55
11¼	25.38	20	45.12
11¹⁄2	25.94

John BUZZUFY

John BUZZUFY

Looking for information on watches, watch parts or watchmaker tools? BUZZUY blog provides valuable information on vintage and modern watches, chronographs, modern timepieces and collectibles. Follow BUZZUFY on Social Media as well for more information and updates. @buzzufy

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