Measured by American Standard Music Wire Gauge
Mapes Piano Wire, unexcelled for strength, uniformity, and tonal quality.
Available for purchase from PianoSupplies.com
Size Dia. Feet per lb.
(approx.)
12
12-1/2
13
13-1/2
14
14-1/2
15
15-1/2
16
16-1/2
17
17-1/2
18
18-1/2
19
19-1/2
20
20-1/2
21
21-1/2
22
23
24
25 		.029"
.030
.031
.032
.033
.034
.035
.036
.037
.038
.039
.040
.041
.042
.043
.044
.045
.046
.047
.048
.049
.051
.055
.059 		445
415
384
366
330
300
295
290
275
260
248
234
223
212
200
190
182
174
165
160
156
140
125
100
Specialty Wire - 1/2 lb coils
3
4
5
6
7
8
9
10
11 		.012
.013
.014
.016
.018
.020
.022
.024
.026 		2,560
2,170
1,886
1,428
1,136
917
757
636
540