Most of our customers who order a storage container with rollup doors want them placed along the side of a container. By measuring how long the product is going into the container, you will be able to best decide which rollup door is best for you. The container doors come in 8-foot, 10-foot and 12-foot sizes. If you have any other questions about containers with rollup doors, please call us at 1-800-GET-EAGLE (438-3245) and we can answer your questions.