Thank you for viewing. It transforms from a hip pack when you have few items to a backpack when you have many. It's quite a useful item. I used it occasionally, but it hasn't been used at all for the past ten-odd years and has just been gathering dust in the closet. Width: 30cm Height: 40cm (20cm when used as a hip pack) Depth (bottom): 13cm *Approximate dimensions To prevent swapping, returns are not accepted.