Średnica
wewnętrzna

Obwód
wewnętrzny

Rozmiar
Region/Kraj

Cale

mm

Cale

mm

Polska
Europa

USA
Kanada

Wlk. Brytania
Irlandia
Australia

Japonia

Szwajcaria

0.458

11.6

1.438

36.5

0

0.466

11.8

1.463

37.2

0.474

12.0

1.488

37.8

A

0.482

12.2

1.513

38.4

A 1/2

0.490

12.4

1.539

39.1

1

B

1

0.498

12.6

1.564

39.7

1 1/4

B 1/2

0.506

12.9

1.589

40.4

1 1/2

C

0.514

13.1

1.614

41.0

1 3/4

C 1/2

0.522

13.3

1.639

41.6

2

D

2

1.50

0.530

13.5

1.664

42.3

2 1/4

D 1/2

0.538

13.7

1.689

42.9

2 1/2

E

3

2.75

0.546

13.9

1.714

43.5

2 3/4

E 1/2

0.554

14.1

1.740

44.2

3

F

4

4.00

0.562

14.3

1.765

44.8

3 1/4

F 1/2

5

5.25

0.570

14.5

1.790

45.5

3 1/2

G

0.578

14.7

1.815

46.1

6

3 3/4

G 1/2

6

6.50

0.586

14.9

1.840

46.7

4

H 

7

0.594

15.1

1.865

47.4

7

4 1/4

H 1/2

7.75

0.602

15.3

1.890

48.0

4 1/2

I 

8

0.610

15.5

1.915

48.7

8,5

4 3/4

J

9.00

0.618

15.7

1.941

49.3

5

J 1/2

9

0.626

15.9

1.966

49.9

10

5 1/4

K

10.00

0.634

16.1

1.991

50.6

5 1/2

K 1/2

10

0.642

16.3

2.016

51.2

11

5 3/4

L

11.75

0.650

16.5

2.041

51.8

6

L 1/2

11

12.75

0.658

16.7

2.066

52.5

12

6 1/4

M 

12

0.666

16.9

2.091

53.1

6 1/2

M 1/2

13

14.00

0.674

17.1

2.116

53.8

13,5

6 3/4

N

0.682

17.3

2.141

54.4

7

N 1/2

14

15.25

0.690

17.5

2.167

55.0

15

7 1/4

O 

0.698

17.7

2.192

55.7

7 1/2

O 1/2

15

16.50

0.706

17.9

2.217

56.3

16

7 3/4

P 

0.714

18.1

2.242

56.9

8

P 1/2

16

17.75

0.722

18.3

2.267

57.6

17

8 1/4

Q 

0.730

18.5

2.292

58.2

8 1/2

Q 1/2

17

0.738

18.7

2.317

58.9

18,5

8 3/4

R

19

0.746

18.9

2.342

59.5

9

R 1/2

18

0.754

19.2

2.368

60.1

20

9 1/4

S

20.25

0.762

19.4

2.393

60.8

9 1/2

S 1/2

19

0.770

19.6

2.418

61.4

21

9 3/4

T

21.5

0.778

19.8

2.443

62.1

10

T 1/2

20

0.786

20.0

2.468

62.7

22,5

10 1/4

U

21

0.794

20.2

2.493

63.3

10 1/2

U 1/2

22

22.75

0.802

20.4

2.518

64.0

24

10 3/4

V

0.810

20.6

2.543

64.6

11

V 1/2

23

0.818

20.8

2.569

65.2

25

11 1/4

W

25

0.826

21.0

2.594

65.9

11 1/2

W 1/2

24

0.834

21.2

2.619

66.5

26

11 3/4

X

0.842

21.4

2.644

67.2

12

X 1/2

25

27.50

0.850

21.6

2.669

67.8

27

12 1/4

Y 

0.858

21.8

2.694

68.4

28

12 1/2

Z

26

28.75

0.866

22.0

2.719

69.1

12 3/4

Z 1/2

0.874

22.2

2.744

69.7

29

13

27

0.882

22.4

2.769

70.3

13 1/4

Z1

0.890

22.6

2.795

71.0

13 1/2

0.898

22.8

2.820

71.6

13 3/4

Z2

0.906

23.0

2.845

72.3

31

14

Z3

0.914

23.2

2.870

72.9

14 1/4

0.922

23.4

2.895

73.5

14 1/2

Z4

0.930

23.6

2.920

74.2

14 3/4

0.938

23.8

2.945

74.8

15

0.946

24.0

2.970

75.4

15 1/4

0.954

24.2

2.996

76.1

15 1/2

0.962

24.4

3.021

76.7

15 3/4

0.970

24.6

3.046

77.4

16

0.978

24.8

3.071

78.0

16 1/4

0.986

25.0

3.096

78.6

16 1/2

0.994

25.2

3.121

79.3

16 3/4

1.002

25.5

3.146

79.9

17

1.010

25.7

3.171

80.6

17 1/4

1.018

25.9

3.197

81.2

17 1/2

1.026

26.1

3.222

81.8

17 3/4

1.034

26.3

3.247

82.5

18

1.042

26.5

3.272

83.1

18 1/4

1.050

26.7

3.297

83.7

18 1/2

1.058

26.9

3.322

84.4

18 3/4

1.066

27.1

3.347

85.0

19

1.074

27.3

3.372

85.7

19 1/4

1.082

27.5

3.397

86.3

19 1/2

1.090

27.7

3.423

86.9

19 3/4

1.098

27.9

3.448

87.6

20

1.106

28.1

3.473

88.2

20 1/4

1.114

28.3

3.498

88.8

20 1/2

1.122

28.5

3.523

89.5

20 3/4

1.130

28.7

3.548

90.1

21

1.138

28.9

3.573

90.8

21 1/4

1.146

29.1

3.598

91.4

21 1/2

1.154

29.3

3.624

92.0

21 3/4

1.162

29.5

3.649

92.7

22

1.170

29.7

3.674

93.3

22 1/4

1.178

29.9

3.699

94.0

22 1/2

1.186

30.1

3.724

94.6

22 3/4

1.194

30.3

3.749

95.2

23

1.202

30.5

3.774

95.9

23 1/4

1.210

30.7

3.799

96.5

23 1/2

1.218

30.9

3.825

97.1

23 3/4

1.226

31.1

3.850

97.8

24

1.234

31.3

3.875

98.4

24 1/4

1.242

31.5

3.900

99.1

24 1/2

1.250

31.8

3.925

99.7

24 3/4

1.258

32.0

3.950

100.3

25

1.266

32.2

3.975

101.0

25 1/4

1.274

32.4

4.000

101.6

25 1/2

1.282

32.6

4.025

102.2

25 3/4

1.290

32.8

4.051

102.9

26

1.298

33.0

4.076

103.5

26 1/4