dont know if this helps,,,,its from fur harvesters auction
BOARD SIZES
This diagram illustrates how you should read the board size measurements. The first number is the lenght and the second number is the width. In this example, at two inches from the tip of the board, the width should measure three inches. At six inches from the tip of the board, the width should measure 5 inches, and so on. The board thickness varies from 3/8" to 1/2", depending on what size board you are making. The smaller boards such as muskrat and weasel will be 3/8" while larger boards such as fox and otter will be 1/2".
The board sizes for all other species are listed below.
Fox
2" = 2 5/8"
4" = 3 1/2"
6" = 4 1/4"
12" = 5 1/8"
60"= 5 1/4"
Marten (male)
2" = 1 7/8"
6" = 2 1/2"
12" = 3"
24" = 3 3/4"
36" = 4 1/2"
Marten (female)
2" = 1 1/2"
6" = 2 3/8"
12" = 2 5/8"
24" = 3 1/4"
36" = 3 1/2"
Fisher
2" = 2 3/4"
6" = 4 1/4"
12" = 4 3/8"
24" = 4 1/2"
36" = 4 3/4"
48" = 5"
Lynx & Bobcat
2" = 3"
6" = 5"
12" = 6 1/2"
24" = 6 3/4"
40" = 7 1/2"
72" = 8"
Coyote
2" = 3"
6" = 5"
12" = 6 3/4"
24" = 8 3/8"
34" = 9 1/4"
48" = 10"
72" = 11 1/4"
Badger
2" = 3"
6" = 5"
12" = 6 1/2"
24" = 7"
36" = 7 1/4"
48" = 7 1/2"
Otter
2" = 3 1/4"
6" = 4 1/2"
12" = 5 1/2"
24" = 6 3/8"
40" = 7 3/8"
66" = 7 5/8"
Raccoon
2" = 3"
6" = 5"
12" = 6 1/2"
24" = 7"
36" = 7 1/4"
48" = 7 1/2"
Mink (male)
2" = 1 7/8"
6" = 2 1/2"
12" = 3"
24" = 3 3/4"
36" = 4 1/2"
Mink (female)
2" = 1 1/2"
6" = 2 3/8"
12" = 2 5/8"
24" = 3 1/4"
36" = 3 1/2"
Muskrat
2" = 3 1/4"
4" = 4 3/8"
7" = 5 1/4"
12" = 5 7/8"
24" = 6 1/2"
Weasel
2" = 1 1/4"
10" = 1 3/4"
25" = 2"
Squirrel
2" = 1 11/16"
9" = 2 1/4"
19" = 2 1/2"
Opossum & Skunk
2" = 2 5/8"
4" = 3 1/2"
6" = 4 1/4"
12" = 5 1/8"
60"= 5 1/4"
Wolf
2" = 3"
6" = 5"
12" = 6 3/4"
24" = 8 3/8"
34" = 9 1/4"
48" = 10"
72" = 11 1/4"
96" = 12"
Wolverine
2" = 3"
6" = 5"
12" = 6 3/4"
24" = 8 3/8"
34" = 9 1/4"
48" = 10"
60" = 10 1/8"