Product https://vectorportart.com/products/ro...• Dimensions: Finished product size: 4” x 4” x 0.5” (100 x 100 x 12 mm) Sheet size: 11” x 4.5” (280 x 115 mm) The slots are made for 1/8" (3.2mm), 3.0 mm 4.0 mm thick materials.