We're breaking down the trim box today. These instructions will work for a box of any dimensions, but I'm in the middle of this particular project, so you get the ones for trim! These instructions are meant for personal use.
This is the BEST pillow mattress tutorial I found! This lady actually took MEASUREMENTS and she describes how to make a 4 or 5 pillow bed. Pin this one! OR buy pillow cases, sew together, stuff w/pillows, velcro ends