Gregory Bender

DIN 3771 O-ring standard specifications (metric)

I learned much of this information from the Precision Associates website.

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About the DIN 3771 standard for O-rings

The DIN 3771 standard for O-rings is produced by the Duetsches Institut für Normung (German Institute for Standards). The DIN 3771 specification describes 258 O-rings. Each size is designated by the ID × cross-section. Optionally, this designation may be followed by a letter indicating the quality level (N - normal quality; S - special quality. Subsequent to the letter indicating the quality level, the rubber polymer and IRHD hardness may be specified.

In contrast to the AS 568 A inch system, the nominal and physical dimensions of metric O-rings match precisely. That is, a 1 mm O-ring will have a cross-section of 1 mm. The space that is being filled must be about 10% to 15% smaller than the cross-section of the O-ring in order for O-ring to seal properly.

Sizes within the DIN 3771 standard for O-rings

Size reference codeDecimal size in millimetersDecimal size in inches
Cross-sectionIDCross-sectionID
1.8 × 1.8 (1.8X1.8)1.8 mm1.8 mm0.071 inch0.071 inch
2 × 1.8 (2X1.8)1.8 mm2 mm0.071 inch0.079 inch
2.24 × 1.8 (2.24X1.8)1.8 mm2.24 mm0.071 inch0.088 inch
2.5 × 1.8 (2.5X1.8)1.8 mm2.5 mm0.071 inch0.098 inch
2.8 × 1.8 (2.8X1.8)1.8 mm2.8 mm0.071 inch0.11 inch
3.15 × 1.8 (3.15X1.8)1.8 mm3.15 mm0.071 inch0.124 inch
3.55 × 1.8 (3.55X1.8)1.8 mm3.55 mm0.071 inch0.14 inch
3.75 × 1.8 (3.75X1.8)1.8 mm3.75 mm0.071 inch0.148 inch
4 × 1.8 (4X1.8)1.8 mm4 mm0.071 inch0.157 inch
4.5 × 1.8 (4.5X1.8)1.8 mm4.5 mm0.071 inch0.177 inch
4.87 × 1.8 (4.87X1.8)1.8 mm4.87 mm0.071 inch0.192 inch
5 × 1.8 (5X1.8)1.8 mm5 mm0.071 inch0.197 inch
5.15 × 1.8 (5.15X1.8)1.8 mm5.15 mm0.071 inch0.203 inch
5.3 × 1.8 (5.3X1.8)1.8 mm5.3 mm0.071 inch0.209 inch
5.6 × 1.8 (5.6X1.8)1.8 mm5.6 mm0.071 inch0.22 inch
6 × 1.8 (6X1.8)1.8 mm6 mm0.071 inch0.236 inch
6.3 × 1.8 (6.3X1.8)1.8 mm6.3 mm0.071 inch0.248 inch
6.7 × 1.8 (6.7X1.8)1.8 mm6.7 mm0.071 inch0.264 inch
6.9 × 1.8 (6.9X1.8)1.8 mm6.9 mm0.071 inch0.272 inch
7.1 × 1.8 (7.1X1.8)1.8 mm7.1 mm0.071 inch0.28 inch
7.5 × 1.8 (7.5X1.8)1.8 mm7.5 mm0.071 inch0.295 inch
8 × 1.8 (8X1.8)1.8 mm8 mm0.071 inch0.315 inch
8.5 × 1.8 (8.5X1.8)1.8 mm8.5 mm0.071 inch0.335 inch
8.75 × 1.8 (8.75X1.8)1.8 mm8.75 mm0.071 inch0.344 inch
9 × 1.8 (9X1.8)1.8 mm9 mm0.071 inch0.354 inch
9.5 × 1.8 (9.5X1.8)1.8 mm9.5 mm0.071 inch0.374 inch
10 × 1.8 (10X1.8)1.8 mm10 mm0.071 inch0.394 inch
10.6 × 1.8 (10.6X1.8)1.8 mm10.6 mm0.071 inch0.417 inch
11.2 × 1.8 (11.2X1.8)1.8 mm11.2 mm0.071 inch0.441 inch
11.8 × 1.8 (11.8X1.8)1.8 mm11.8 mm0.071 inch0.465 inch
12.5 × 1.8 (12.5X1.8)1.8 mm12.5 mm0.071 inch0.492 inch
13.2 × 1.8 (13.2X1.8)1.8 mm13.2 mm0.071 inch0.52 inch
14 × 1.8 (14X1.8)1.8 mm14 mm0.071 inch0.551 inch
15 × 1.8 (15X1.8)1.8 mm15 mm0.071 inch0.591 inch
16 × 1.8 (16X1.8)1.8 mm16 mm0.071 inch0.63 inch
17 × 1.8 (17X1.8)1.8 mm17 mm0.071 inch0.669 inch
14 × 2.65 (14X2.65)2.65 mm14 mm0.104 inch0.551 inch
15 × 2.65 (15X2.65)2.65 mm15 mm0.104 inch0.591 inch
16 × 2.65 (16X2.65)2.65 mm16 mm0.104 inch0.63 inch
17 × 2.65 (17X2.65)2.65 mm17 mm0.104 inch0.669 inch
18 × 2.65 (18X2.65)2.65 mm18 mm0.104 inch0.709 inch
19 × 2.65 (19X2.65)2.65 mm19 mm0.104 inch0.748 inch
20 × 2.65 (20X2.65)2.65 mm20 mm0.104 inch0.787 inch
21.2 × 2.65 (21.2X2.65)2.65 mm21.2 mm0.104 inch0.835 inch
22.4 × 2.65 (22.4X2.65)2.65 mm22.4 mm0.104 inch0.882 inch
23.6 × 2.65 (23.6X2.65)2.65 mm23.6 mm0.104 inch0.929 inch
25 × 2.65 (25X2.65)2.65 mm25 mm0.104 inch0.984 inch
25.8 × 2.65 (25.8X2.65)2.65 mm25.8 mm0.104 inch1.016 inch
26.5 × 2.65 (26.5X2.65)2.65 mm26.5 mm0.104 inch1.043 inch
28 × 2.65 (28X2.65)2.65 mm28 mm0.104 inch1.102 inch
30 × 2.65 (30X2.65)2.65 mm30 mm0.104 inch1.181 inch
31.5 × 2.65 (31.5X2.65)2.65 mm31.5 mm0.104 inch1.24 inch
32.5 × 2.65 (32.5X2.65)2.65 mm32.5 mm0.104 inch1.28 inch
33.5 × 2.65 (33.5X2.65)2.65 mm33.5 mm0.104 inch1.319 inch
34.5 × 2.65 (34.5X2.65)2.65 mm34.5 mm0.104 inch1.358 inch
35.5 × 2.65 (35.5X2.65)2.65 mm35.5 mm0.104 inch1.398 inch
36.5 × 2.65 (36.5X2.65)2.65 mm36.5 mm0.104 inch1.437 inch
37.5 × 2.65 (37.5X2.65)2.65 mm37.5 mm0.104 inch1.476 inch
38.7 × 2.65 (38.7X2.65)2.65 mm38.7 mm0.104 inch1.524 inch
18 × 3.55 (18X3.55)3.55 mm18 mm0.14 inch0.709 inch
19 × 3.55 (19X3.55)3.55 mm19 mm0.14 inch0.748 inch
20 × 3.55 (20X3.55)3.55 mm20 mm0.14 inch0.787 inch
21.2 × 3.55 (21.2X3.55)3.55 mm21.2 mm0.14 inch0.835 inch
22.4 × 3.55 (22.4X3.55)3.55 mm22.4 mm0.14 inch0.882 inch
23.6 × 3.55 (23.6X3.55)3.55 mm23.6 mm0.14 inch0.929 inch
25 × 3.55 (25X3.55)3.55 mm25 mm0.14 inch0.984 inch
25.8 × 3.55 (25.8X3.55)3.55 mm25.8 mm0.14 inch1.016 inch
26.5 × 3.55 (26.5X3.55)3.55 mm26.5 mm0.14 inch1.043 inch
28 × 3.55 (28X3.55)3.55 mm28 mm0.14 inch1.102 inch
30 × 3.55 (30X3.55)3.55 mm30 mm0.14 inch1.181 inch
31.5 × 3.55 (31.5X3.55)3.55 mm31.5 mm0.14 inch1.24 inch
32.5 × 3.55 (32.5X3.55)3.55 mm32.5 mm0.14 inch1.28 inch
33.5 × 3.55 (33.5X3.55)3.55 mm33.5 mm0.14 inch1.319 inch
34.5 × 3.55 (34.5X3.55)3.55 mm34.5 mm0.14 inch1.358 inch
35.5 × 3.55 (35.5X3.55)3.55 mm35.5 mm0.14 inch1.398 inch
36.5 × 3.55 (36.5X3.55)3.55 mm36.5 mm0.14 inch1.437 inch
37.5 × 3.55 (37.5X3.55)3.55 mm37.5 mm0.14 inch1.476 inch
38.7 × 3.55 (38.7X3.55)3.55 mm38.7 mm0.14 inch1.524 inch
40 × 3.55 (40X3.55)3.55 mm40 mm0.14 inch1.575 inch
41.2 × 3.55 (41.2X3.55)3.55 mm41.2 mm0.14 inch1.622 inch
42.5 × 3.55 (42.5X3.55)3.55 mm42.5 mm0.14 inch1.673 inch
43.7 × 3.55 (43.7X3.55)3.55 mm43.7 mm0.14 inch1.72 inch
45 × 3.55 (45X3.55)3.55 mm45 mm0.14 inch1.772 inch
46.2 × 3.55 (46.2X3.55)3.55 mm46.2 mm0.14 inch1.819 inch
47.5 × 3.55 (47.5X3.55)3.55 mm47.5 mm0.14 inch1.87 inch
48.7 × 3.55 (48.7X3.55)3.55 mm48.7 mm0.14 inch1.917 inch
50 × 3.55 (50X3.55)3.55 mm50 mm0.14 inch1.969 inch
51.5 × 3.55 (51.5X3.55)3.55 mm51.5 mm0.14 inch2.028 inch
53 × 3.55 (53X3.55)3.55 mm53 mm0.14 inch2.087 inch
54.5 × 3.55 (54.5X3.55)3.55 mm54.5 mm0.14 inch2.146 inch
56 × 3.55 (56X3.55)3.55 mm56 mm0.14 inch2.205 inch
58 × 3.55 (58X3.55)3.55 mm58 mm0.14 inch2.283 inch
60 × 3.55 (60X3.55)3.55 mm60 mm0.14 inch2.362 inch
61.5 × 3.55 (61.5X3.55)3.55 mm61.5 mm0.14 inch2.421 inch
63 × 3.55 (63X3.55)3.55 mm63 mm0.14 inch2.48 inch
65 × 3.55 (65X3.55)3.55 mm65 mm0.14 inch2.559 inch
67 × 3.55 (67X3.55)3.55 mm67 mm0.14 inch2.638 inch
69 × 3.55 (69X3.55)3.55 mm69 mm0.14 inch2.717 inch
71 × 3.55 (71X3.55)3.55 mm71 mm0.14 inch2.795 inch
73 × 3.55 (73X3.55)3.55 mm73 mm0.14 inch2.874 inch
75 × 3.55 (75X3.55)3.55 mm75 mm0.14 inch2.953 inch
77.5 × 3.55 (77.5X3.55)3.55 mm77.5 mm0.14 inch3.051 inch
80 × 3.55 (80X3.55)3.55 mm80 mm0.14 inch3.15 inch
82.5 × 3.55 (82.5X3.55)3.55 mm82.5 mm0.14 inch3.248 inch
85 × 3.55 (85X3.55)3.55 mm85 mm0.14 inch3.346 inch
87.5 × 3.55 (87.5X3.55)3.55 mm87.5 mm0.14 inch3.445 inch
90 × 3.55 (90X3.55)3.55 mm90 mm0.14 inch3.543 inch
92.5 × 3.55 (92.5X3.55)3.55 mm92.5 mm0.14 inch3.642 inch
95 × 3.55 (95X3.55)3.55 mm95 mm0.14 inch3.74 inch
97.5 × 3.55 (97.5X3.55)3.55 mm97.5 mm0.14 inch3.839 inch
100 × 3.55 (100X3.55)3.55 mm100 mm0.14 inch3.937 inch
103 × 3.55 (103X3.55)3.55 mm103 mm0.14 inch4.055 inch
106 × 3.55 (106X3.55)3.55 mm106 mm0.14 inch4.173 inch
109 × 3.55 (109X3.55)3.55 mm109 mm0.14 inch4.291 inch
112 × 3.55 (112X3.55)3.55 mm112 mm0.14 inch4.409 inch
115 × 3.55 (115X3.55)3.55 mm115 mm0.14 inch4.528 inch
118 × 3.55 (118X3.55)3.55 mm118 mm0.14 inch4.646 inch
122 × 3.55 (122X3.55)3.55 mm122 mm0.14 inch4.803 inch
125 × 3.55 (125X3.55)3.55 mm125 mm0.14 inch4.921 inch
128 × 3.55 (128X3.55)3.55 mm128 mm0.14 inch5.039 inch
132 × 3.55 (132X3.55)3.55 mm132 mm0.14 inch5.197 inch
136 × 3.55 (136X3.55)3.55 mm136 mm0.14 inch5.354 inch
140 × 3.55 (140X3.55)3.55 mm140 mm0.14 inch5.512 inch
145 × 3.55 (145X3.55)3.55 mm145 mm0.14 inch5.709 inch
150 × 3.55 (150X3.55)3.55 mm150 mm0.14 inch5.906 inch
155 × 3.55 (155X3.55)3.55 mm155 mm0.14 inch6.102 inch
160 × 3.55 (160X3.55)3.55 mm160 mm0.14 inch6.299 inch
165 × 3.55 (165X3.55)3.55 mm165 mm0.14 inch6.496 inch
170 × 3.55 (170X3.55)3.55 mm170 mm0.14 inch6.693 inch
175 × 3.55 (175X3.55)3.55 mm175 mm0.14 inch6.89 inch
180 × 3.55 (180X3.55)3.55 mm180 mm0.14 inch7.087 inch
185 × 3.55 (185X3.55)3.55 mm185 mm0.14 inch7.283 inch
190 × 3.55 (190X3.55)3.55 mm190 mm0.14 inch7.48 inch
195 × 3.55 (195X3.55)3.55 mm195 mm0.14 inch7.677 inch
200 × 3.55 (200X3.55)3.55 mm200 mm0.14 inch7.874 inch
40 × 5.3 (40X5.3)5.3 mm40 mm0.209 inch1.575 inch
41.2 × 5.3 (41.2X5.3)5.3 mm41.2 mm0.209 inch1.622 inch
42.5 × 5.3 (42.5X5.3)5.3 mm42.5 mm0.209 inch1.673 inch
43.7 × 5.3 (43.7X5.3)5.3 mm43.7 mm0.209 inch1.72 inch
45 × 5.3 (45X5.3)5.3 mm45 mm0.209 inch1.772 inch
46.2 × 5.3 (46.2X5.3)5.3 mm46.2 mm0.209 inch1.819 inch
47.5 × 5.3 (47.5X5.3)5.3 mm47.5 mm0.209 inch1.87 inch
48.7 × 5.3 (48.7X5.3)5.3 mm48.7 mm0.209 inch1.917 inch
50 × 5.3 (50X5.3)5.3 mm50 mm0.209 inch1.969 inch
51.5 × 5.3 (51.5X5.3)5.3 mm51.5 mm0.209 inch2.028 inch
53 × 5.3 (53X5.3)5.3 mm53 mm0.209 inch2.087 inch
54.5 × 5.3 (54.5X5.3)5.3 mm54.5 mm0.209 inch2.146 inch
56 × 5.3 (56X5.3)5.3 mm56 mm0.209 inch2.205 inch
58 × 5.3 (58X5.3)5.3 mm58 mm0.209 inch2.283 inch
60 × 5.3 (60X5.3)5.3 mm60 mm0.209 inch2.362 inch
61.5 × 5.3 (61.5X5.3)5.3 mm61.5 mm0.209 inch2.421 inch
63 × 5.3 (63X5.3)5.3 mm63 mm0.209 inch2.48 inch
65 × 5.3 (65X5.3)5.3 mm65 mm0.209 inch2.559 inch
67 × 5.3 (67X5.3)5.3 mm67 mm0.209 inch2.638 inch
69 × 5.3 (69X5.3)5.3 mm69 mm0.209 inch2.717 inch
71 × 5.3 (71X5.3)5.3 mm71 mm0.209 inch2.795 inch
73 × 5.3 (73X5.3)5.3 mm73 mm0.209 inch2.874 inch
75 × 5.3 (75X5.3)5.3 mm75 mm0.209 inch2.953 inch
77.5 × 5.3 (77.5X5.3)5.3 mm77.5 mm0.209 inch3.051 inch
80 × 5.3 (80X5.3)5.3 mm80 mm0.209 inch3.15 inch
82.5 × 5.3 (82.5X5.3)5.3 mm82.5 mm0.209 inch3.248 inch
85 × 5.3 (85X5.3)5.3 mm85 mm0.209 inch3.346 inch
87.5 × 5.3 (87.5X5.3)5.3 mm87.5 mm0.209 inch3.445 inch
90 × 5.3 (90X5.3)5.3 mm90 mm0.209 inch3.543 inch
92.5 × 5.3 (92.5X5.3)5.3 mm92.5 mm0.209 inch3.642 inch
95 × 5.3 (95X5.3)5.3 mm95 mm0.209 inch3.74 inch
97.5 × 5.3 (97.5X5.3)5.3 mm97.5 mm0.209 inch3.829 inch
100 × 5.3 (100X5.3)5.3 mm100 mm0.209 inch3.937 inch
103 × 5.3 (103X5.3)5.3 mm103 mm0.209 inch4.055 inch
106 × 5.3 (106X5.3)5.3 mm106 mm0.209 inch4.173 inch
109 × 5.3 (109X5.3)5.3 mm109 mm0.209 inch4.291 inch
112 × 5.3 (112X5.3)5.3 mm112 mm0.209 inch4.409 inch
115 × 5.3 (115X5.3)5.3 mm115 mm0.209 inch4.528 inch
118 × 5.3 (118X5.3)5.3 mm118 mm0.209 inch4.646 inch
122 × 5.3 (122X5.3)5.3 mm122 mm0.209 inch4.803 inch
125 × 5.3 (125X5.3)5.3 mm125 mm0.209 inch4.921 inch
128 × 5.3 (128X5.3)5.3 mm128 mm0.209 inch5.039 inch
132 × 5.3 (132X5.3)5.3 mm132 mm0.209 inch5.1971 inch
136 × 5.3 (136X5.3)5.3 mm136 mm0.209 inch5.354 inch
140 × 5.3 (140X5.3)5.3 mm140 mm0.209 inch5.5121 inch
145 × 5.3 (145X5.3)5.3 mm145 mm0.209 inch5.709 inch
150 × 5.3 (150X5.3)5.3 mm150 mm0.209 inch5.906 inch
155 × 5.3 (155X5.3)5.3 mm155 mm0.209 inch6.1021 inch
160 × 5.3 (160X5.3)5.3 mm160 mm0.209 inch6.299 inch
165 × 5.3 (165X5.3)5.3 mm165 mm0.209 inch6.496 inch
170 × 5.3 (170X5.3)5.3 mm170 mm0.209 inch6.6931 inch
175 × 5.3 (175X5.3)5.3 mm175 mm0.209 inch6.89 inch
180 × 5.3 (180X5.3)5.3 mm180 mm0.209 inch7.0871 inch
185 × 5.3 (185X5.3)5.3 mm185 mm0.209 inch7.2831 inch
190 × 5.3 (190X5.3)5.3 mm190 mm0.209 inch7.48 inch
195 × 5.3 (195X5.3)5.3 mm195 mm0.209 inch7.677 inch
200 × 5.3 (200X5.3)5.3 mm200 mm0.209 inch7.8741 inch
206 × 5.3 (206X5.3)5.3 mm206 mm0.209 inch8.1101 inch
212 × 5.3 (212X5.3)5.3 mm212 mm0.209 inch8.346 inch
218 × 5.3 (218X5.3)5.3 mm218 mm0.209 inch8.583 inch
224 × 5.3 (224X5.3)5.3 mm224 mm0.209 inch8.819 inch
230 × 5.3 (230X5.3)5.3 mm230 mm0.209 inch9.055 inch
236 × 5.3 (236X5.3)5.3 mm236 mm0.209 inch9.291 inch
243 × 5.3 (243X5.3)5.3 mm243 mm0.209 inch9.567 inch
250 × 5.3 (250X5.3)5.3 mm250 mm0.209 inch9.843 inch
258 × 5.3 (258X5.3)5.3 mm258 mm0.209 inch10.157 inch
265 × 5.3 (265X5.3)5.3 mm265 mm0.209 inch10.433 inch
272 × 5.3 (272X5.3)5.3 mm272 mm0.209 inch10.709 inch
280 × 5.3 (280X5.3)5.3 mm280 mm0.209 inch11.024 inch
290 × 5.3 (290X5.3)5.3 mm290 mm0.209 inch11.417 inch
300 × 5.3 (300X5.3)5.3 mm300 mm0.209 inch11.811 inch
307 × 5.3 (307X5.3)5.3 mm307 mm0.209 inch12.087 inch
315 × 5.3 (315X5.3)5.3 mm315 mm0.209 inch12.402 inch
325 × 5.3 (325X5.3)5.3 mm325 mm0.209 inch12.795 inch
335 × 5.3 (335X5.3)5.3 mm335 mm0.209 inch13.189 inch
345 × 5.3 (345X5.3)5.3 mm345 mm0.209 inch13.583 inch
355 × 5.3 (355X5.3)5.3 mm355 mm0.209 inch13.976 inch
365 × 5.3 (365X5.3)5.3 mm365 mm0.209 inch14.37 inch
375 × 5.3 (375X5.3)5.3 mm375 mm0.209 inch14.764 inch
387 × 5.3 (387X5.3)5.3 mm387 mm0.209 inch15.236 inch
400 × 5.3 (400X5.3)5.3 mm400 mm0.209 inch15.748 inch
206 × 7 (206X7)7 mm206 mm0.276 inch8.11 inch
212 × 7 (212X7)7 mm212 mm0.276 inch8.3461 inch
218 × 7 (218X7)7 mm218 mm0.276 inch8.583 inch
224 × 7 (224X7)7 mm224 mm0.276 inch8.819 inch
230 × 7 (230X7)7 mm230 mm0.276 inch9.055 inch
236 × 7 (236X7)7 mm236 mm0.276 inch9.291 inch
243 × 7 (243X7)7 mm243 mm0.276 inch9.567 inch
250 × 7 (250X7)7 mm250 mm0.276 inch9.843 inch
258 × 7 (258X7)7 mm258 mm0.276 inch10.157 inch
265 × 7 (265X7)7 mm265 mm0.276 inch10.433 inch
272 × 7 (272X7)7 mm272 mm0.276 inch10.709 inch
280 × 7 (280X7)7 mm280 mm0.276 inch11.024 inch
290 × 7 (290X7)7 mm290 mm0.276 inch11.417 inch
300 × 7 (300X7)7 mm300 mm0.276 inch11.811 inch
307 × 7 (307X7)7 mm307 mm0.276 inch12.087 inch
315 × 7 (315X7)7 mm315 mm0.276 inch12.402 inch
325 × 7 (325X7)7 mm325 mm0.276 inch12.795 inch
335 × 7 (335X7)7 mm335 mm0.276 inch13.189 inch
345 × 7 (345X7)7 mm345 mm0.276 inch13.583 inch
355 × 7 (355X7)7 mm355 mm0.276 inch13.976 inch
365 × 7 (365X7)7 mm365 mm0.276 inch14.37 inch
375 × 7 (375X7)7 mm375 mm0.276 inch14.764 inch
387 × 7 (387X7)7 mm387 mm0.276 inch15.236 inch
400 × 7 (400X7)7 mm400 mm0.276 inch15.748 inch
412 × 7 (412X7)7 mm412 mm0.276 inch16.22 inch
425 × 7 (425X7)7 mm425 mm0.276 inch16.732 inch
437 × 7 (437X7)7 mm437 mm0.276 inch17.205 inch
450 × 7 (450X7)7 mm450 mm0.276 inch17.717 inch
462 × 7 (462X7)7 mm462 mm0.276 inch18.189 inch
475 × 7 (475X7)7 mm475 mm0.276 inch18.701 inch
487 × 7 (487X7)7 mm487 mm0.276 inch19.173 inch
500 × 7 (500X7)7 mm500 mm0.276 inch19.685 inch
515 × 7 (515X7)7 mm515 mm0.276 inch20.276 inch
530 × 7 (530X7)7 mm530 mm0.276 inch20.866 inch
545 × 7 (545X7)7 mm545 mm0.276 inch21.457 inch
560 × 7 (560X7)7 mm560 mm0.276 inch22.047 inch
580 × 7 (580X7)7 mm580 mm0.276 inch22.835 inch
600 × 7 (600X7)7 mm600 mm0.276 inch23.622 inch
615 × 7 (615X7)7 mm615 mm0.276 inch24.213 inch
630 × 7 (630X7)7 mm630 mm0.276 inch24.803 inch
650 × 7 (650X7)7 mm650 mm0.276 inch25.591 inch
670 × 7 (670X7)7 mm670 mm0.276 inch26.378 inch