I think that for a full size, 8' wide bed truck, about 1/2 cord if you fill it level full. Middle section of the floor is about 4X8, but the bed sides are less than 2ft high, with the area around the wheel wells making up the difference. But since the ranger bed is smaller length and width, it's have to be piled up pretty full to get 1/2 cord. In my younger years, I used to sell a little wood, I had a '53 Chevy 1 ton flatbed don't remember the dimensions of the bed, but I had made sideboards about 28-30 in high that would hold 1 cord when stacked level full.