Pratt Sound Set

The sounds are 30cm long with two sizes on each end, there are eight sounds giving a total of 16 sizes.

13 - 4.5mm
15 - 5mm
17 - 6mm
19 - 6.5mm
21 - 7.5mm
23 - 8mm
25 - 8.5mm
27 - 9mm
29 - 10mm
31 - 10.5mm
33 - 11.5mm
35 - 12mm
37 - 12.5mm
39 - 13mm
41 - 14mm
43 - 14.5mm