I had made two fleece blankets, (the ones you tie together with strips all around). I put it in the smallest box I could fit them into and took it to the PO. It was almost $20. Took it home. Called the main PO and asked how come so much, as they were light. He said it was the size of the box. So I got the vacuum bags and made them fit into the medium $12something box. Had to sit on the bag to get it to squeeze out as much space/air as I could, undo and shift the contents, etc. Finally made it fit!