About Momme each size,
8mm 0.20 to 0.27
9mm 0.28 to 0.37
10mm 0.39 to 0.50
11mm 0.51 to 0.66
12mm 0.67 to 0.84
13mm 0.85 to 1.00
14mm 1.00 to 1.29
15mm 1.31 to 1.58
16mm 1.59 to 1.89
17mm 1.91 to 2.25
18mm 2.26 to 2.65
19mm 2.66 to 3.09
20mm 3.10 to 3.58
Those are about the size and momme.