WIDGETCO 1/2 inch Self-Adhesive Cork Wall Tile Squares (6 pack) Pack contains: 6 square tiles, self-adhesive Do not apply to new paint for 2 weeks. After opening, allow cork 72 hours to acclimate. Apply to clean dry walls. Apply 2 tiles for 24 hours for test adhesion. Each tile size: 1 SQ FT (12" x 12") Tile thickness: 1/2" (12mm). Tolerance is +/- 1/32 inch (0.8 mm) Rarely, if adhesion problem, apply construction glue as added measure.