The pattern is written in us terms, (However the hook size is in mm)
Watch this tutorial and apply it through out the pattern to help you achieve straight edges.
I added a cotton lining to the base to help keep the shape of the wall pocket. However the pattern is designed to be sturdy enough to keep its shape even without the lining.
I decided to make my top pockets with burlap fabric. However you can make it with crochet too if you prefer.
I used a glue gun to glue the pompoms and tassel trims to my wall pocket/organizer.