Measure the biggest piece of clothing that you want to store. Draw a mark for the height, leaving a little space to trim later.
Cut out the paper as long as you want. You can always tape on more paper later if it ends up being too short.
Accordion fold the paper so that the outfit on one end fits comfortably with nothing poking out.
Put the other outfits on each fold, as shown in the picture.
Trim the edges to make them even.
Label the closet so you know what it contains, then tape the sides shut.
You're done! Hope you found this useful, and if you have another way of storing doll things please let me know!