It does need to be cut to size, but it’s really easy to do. The mat will cut easily with a pair of scissors, and there are guidelines moulded into the mat to follow.
My approach is to put the whole mat in the boot, aligning one straight side along one side of the boot. I then use a Sharpie to mark a line along the side I need to cut. Always make the first cut just outside the line you mark. It’s easy to cut a bit more off, impossible to add a bit on...Then repeat for the length. So two long straight cuts, then a bit of trimming round the curves at the back. The mat is very flexible, so it’s easy to lift up the flap for the under stowage area.
