I used a child’s shoebox for this project. It had an attached lid which I didn’t want in my finished storage box, so I cut the top off and just used the bottom half.
Next, measure a piece of fabric to be a bit longer than the two sides and bottom of your box put together, probably at least 4-6 inches more than you really need.
I just eyeballed a piece of fabric, placed the box on top and wrapped the fabric up over one side to make sure there was enough spare fabric to fold over to hide the cut fabric edges on the inside of the box.
All fine, until I stopped to take a photo of the glue, and then went to stick the fabric in only to find the glue was already cold and not sticky, so had to do it again!