US size 0 through 00000000

knitting needles compared to drill and wire gauges

US 
size
Milimeters 
(MM)
Inches
Drill 
size
Steel wire 
gauge
(Wasburn & Moen,
or Roebling)
AWG 
(American
Wire Gauge)
UK
size
0
(zero)
2.00
.080
46
14
12
14
00
(double zero)
1.75
.070
50
15
13
15
000
(triple zero)
1.50
.059 rounded to .060
1/16"
17
15
16
0000
(quad zero)
1.25
.049 rounded to .050
55
18
16
17
00000
(quint zero)
1.00
.039 rounded to .040
60
19
18
-
000000
(6 zero)
0.75
.030
N
68
1/32"
22
21
-
0000000
(7 zero)
0.625
.0246 rounded to .025
72
-
-
-
00000000
(hex zero)
0.50
.020
76
25
24
-