We are always happy to answer any questions that you may have about measuring for the proper poly bag you need. See the illustrations below to see the proper way to measure : Layflat Poly Bags, Gusseted Poly Bags, Pallet Covers, Poly Tubing, Box Liners, Reclosable Bags, Slider Top Bags, Zip Top Bags, Trash Can Liners / Bags and so much more!