I made the bag using the tutorial here as a guide. The addition I made was to applique the letter J onto the front. I used a scrap of fabric and drew the J onto the web side of some Bondaweb, this side was then ironed onto the wrong side of the fabric and then cut out. The paper backing was then peeled off and the J was ironed web side down onto the star fabric,
Here’s the finished result after sewing round it twice to secure.
I’ve pressed it with the iron so the square corners (which give the square base) are really obvious here.
There you go…plenty of room for a pair of plimsolls.