Once you click the link don't get confused .. because the link says doormat but it is not.. check the images below in the link you will come to know that is a chair mat...
Item #: 436180 | Model #: 4744-15915-36X48
Material Recycled rubber
Warranty 1-year free from manufacturing defects
Color Family Clear
Actual Width (Inches) 36.0
Actual Length (Inches) 48.0
Type chair mat
Primary Color Gray/Silver
Secondary Color N/A
Approximate Size (W x L) 36" x 48"
Manufacturer Color/Finish Clear
Mat Shape Rectangular