I was aiming for a box 3 1/2" tall so adjusted the formula to suit. My first attempt using scrap fabric wasn't too successful as I made the outer sleeve too tall:
Tall fabric box
The next one in the same fabric was a bit better:
Then I dug out one of my favourite fabrics that I got in the sale at Fabric Rehab:
White Russian Dolls fabric box
I only used the nice fabric for the outer sleeve so that I've got some left for another project in the future.
Black Russian Dolls fabric box
and one together:
Russian Dolls fabric boxes
It's a very clever pattern and cardboard is used to support the sides so it can be removed & the 'box' washed.