Not all sheet goods sold as 1⁄4" stock measure a true 1⁄4" thick. If, for example, you don’t discover that until after you cut the grooves for 1⁄4"-thick drawer bottoms, the rattle coming from your finished drawers will serve as a constant reminder.
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Not all sheet goods sold as 14 " stock measure a true 14 " thick. If, for example, you don't discover that until after you cut the grooves for 14 "-thick drawer bottoms, the rattle coming from your finished drawers will serve as a constant reminder. The lauan plywood above measures close to 1364 ", thin enough to fit loosely. Even today's hardboard sheets measure too thin for a tight fit. The Baltic birch plywood, above, comes closer to a true 14 ", although it's typically manufactured in metric dimensions (14 " equals 6.35mm). For another source of 14 "-thick drawer-bottom stock, try MDF-core plywood.
—from the WOOD shop