Kamatsu Lures: world metric conversion chart.

Hope this helps! Tight lines.

You can use this formula. Take the fraction 0.0353 and multiply by the number of grams. 0.0353 X 15 = .52OZ or 1/2OZ

Grams:

6-8 grams = 1/4oz class

12-15 grams = 1/2oz class

24 grams = 3/4oz class

45 grams = 1.5oz class

Millimeters

Use this formula 0.03937 X number of millimeters. Example 0.03937 X 90= 3.5433 inches

60mm = 2.35"

75mm = 2.95"

90mm = 3.5"

100mm = 3.94"

115mm = 4.5"

130mm = 5.0"

155mm = 6.0"