These protective pads are made from our archival corrugated board and will protect the corners of valuable, fragile, or antique frames while in storage or transit. They will accommodate frames 1, 2, or 3 in. thick. When measuring please be sure to account for decorative work on the front of the frame. Each side of the pad extends 2-3/4 in. down the side of the frame. Protective Corners are offered in packages of twelve corners.