Specifications:- Overall Dimension without Stud(LxWxH): 47 1/4andquot x 35 7/16andquot x 1/8andquot (120 x 90 x 0.25 cm)- Convex Part Size(LxW): 19 1/8" x 9 9/16" (48.5 x 24.3 cm)- Stud Height: 1/16andquot (0.2 cm)- Color: Transparent- Material: Pvc- Total Net Weight: 52.91 Lbs (24 kg). Package Contents:- 8x Pvc Chair Mats- 1x Manual. Notice: - To unroll the mat and lay it flat, it is recommended that the chair mat is placed on a smoot flat surface outside in the sun to warm it up until it flattens.