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Table 8 Sizes for dimension lumber and boards
Boards
Dimension Lumber
Metric Equivalents, mm Dry
Green
Metric Nomenclature, mm
Actual Sizes, in.
38 x 38
40 x 40
38 x 38
2x2
11⁄2 x 11⁄2
19⁄16 x 19⁄16
64
65
64
3
21⁄2
29⁄16
89
90
89
4
31⁄2
39⁄16
140
143
140
6
51⁄2
55⁄8
184
190
184
8
71⁄4
71⁄2
235
241
235
10
91⁄4
91⁄2
286
292
286
12
111⁄4
111⁄2
64 x 64
65 x 65
64 x 64
3 x 3, etc.
21⁄2 x 21⁄2
29⁄16 x 29⁄16
89 x 89
90 x 90
89 x 89
4 x 4, etc.
31⁄2 x 31⁄2
39⁄16 x 39⁄16
19 x 38
21 x 40
19 x 38
1x2
3
⁄4 x 11⁄2
13
64
65
64
3
21⁄2
29⁄16
89
90
89
4
31⁄2
39⁄16
114
117
114
5
41⁄2
45⁄8
140
143
140
6
51⁄2
55⁄8
184
190
184
8
71⁄4
71⁄2
235
241
235
10
91⁄4
91⁄2
286
292
286
12
111⁄4
111⁄2
25 x 38
26 x 40
25 x 38
11⁄4 x 2, etc.
1 x 11⁄2
11⁄32 x 19⁄16
32 x 38
33 x 40
32 x 38
11⁄2 x 2, etc.
11⁄4 x 11⁄2
19⁄32 x 19⁄16
Nominal Sizes, in.
Dry
Green
⁄16 x 19⁄16