For someone with better math skills than mine, if my rolls are 4x4 and I stack four high in a pyramid shape what is the width of the cover that would do the best be suited to cover them. 30x50 or 24x50? I can stack them 3 high or 4 high in the pyramid shape. Seems to me the stack would be around 16 ft high and 16 ft wide or there abouts. So I am thinking the 30x50. I always hated math in school. I want the tarp to be at least hanging down to bottom half or 1/4 of bottom bale.