Solid plastic (Trowbridge BA14)

Hi I started my garden my mum didn't measure right ,I'm putting stones down to make it easy as in wheelchair but I'm short the measure is 25 ft long width is about 4.5ft I only have enough to do half I think 🤔 any help would be great , must be close to Trowbridge cau I will collect in my electric wheelchair and I live by cemetery ty