Spoke with customer service a few times before ordering and they were very helpful and quick to respond. After receiving a tree bag, I had to attach it to my tree stand - that was easy to do. I ordered a Medium TreeKeeperBag and my 7 1/2 ft. slender, pre-lit tree fit without removing the top section. My sister and I (late 60s-early 70s) were able to move the trussed-up tree around furniture, down the stairs, and through tight spaces to store the tree in the basement. The fabric is very sturdy/stiff for storage; I wonder whether it will pack easily under the tree skirt while in use. I'll find out next November! Nan