This is a genuine GM accessory rubber trunk mat. It's designed to lay on top of the standard factory trunk carpet. Very lightly used. Fits 1979-1985 BUICK RIVIERA. May also fit other BUICK's of this approximate vintage. This mat measures 46" across at its widest point and 28-3/4" front to back. Note the factory relief in the mat to accommodate the trunk latch tower. I removed this original GM accessory trunk mat from the trunk of a low-mileage RIVIERA many years ago. The mat is in very good condition. Very flexible, no wear evident, only lightly used for a few years early in its life. The price is $120, plus the shipping. Thanks for looking. John