Catheter Size Information
Conversion in FR/mm/inch (Outer Diameter)
FR
12
14
16
18
20
22
24
26
mm
4
4.7
5.3
6
6.7
7.4
8
8.7
inch
0.16
0.185
0.21
0.24
0.265
0.295
0.32
0.345
FR
28
30
32
34
36
38
40
42
48
mm
9.4
10
10.7
11.3
12
12.7
13.4
14
16
inch
0.375
0.4
0.425
0.455
0.48
0.5
0.53
0.55
0.64