The specified size is the cut size of the fabric. Cut size is the size of the tarp when the fabric is cut and before the final cover or tarp is made. After the hems of fabric are folded and stitched and seams are made, the finished cover size of the tarp is slightly smaller than the actual cut size. Cut size is the tarp industry standard measurement. Cut size measures approximately 6-8 smaller than the actual finished size. Some tarps may actually finish slightly larger than cut size. Cut size does not pertain to custom size or finished size tarps and covers, but only to the standard tarp sizes.