1x4 board should be 3/4" thick, for example a 1x4 is 3/4"x3 1/2". 1x6 is 3/4 X 5 1/2, but a 1x8 is 3/4x7 1/4.
Dimension under 2" are a 1/4" undersized, 6" down to 2 are 1/2" undersized, over 6 are 3/4" undersized.
Last edited by roosterk0031; 11-01-2018 at 06:26 PM..
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