Answer
May 22, 2026 - 06:20 AM
A #20 biscuit is a small, oval-shaped, compressed wood wafer commonly used in woodworking to join two pieces of wood. Measuring about 19mm by 54mm (approximately 3/4" by 2-1/8"), it fits into slots cut by a biscuit joiner. When glue is applied, the biscuit swells, locking the joint tightly for added strength. Always "dry fit" the biscuit before gluing to ensure a proper fit and correct alignment of the wood pieces, which helps achieve precise and durable joints.
