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How to understand lumber sizing

Learn how to understand lumber sizing, what those sizes mean when you are buying boards.

When you’re building projects from plans, you may wonder why you see things like a “1×4″ board in the materials list, but then see project parts sized at 3/4″ x 3 1/2”. The difference lies in the way lumber size is referred to. Here’s how to understand the differences between the stated “nominal” board size and the “actual” size.