Firstly, take the slide out a case and change the color of the snap with the help of nail polish and just gave it a few coats.
Next, “measure” the fabric by wrapping it around the pencil case and cutting. Then, brush on a layer of the fabric glue onto the back of the fabric.
Now you need to cut a small hole for the snaps. Just a tip, after the fabric glue is on the back of the fabric and it is slightly wet, the fabric will stretch easier around the hole.
If desired, use a different coordinating fabric for the inside of the box. Don't worry if there is excess fabric, it can all be trimmed after the glue becomes dry!
To finish off the edges, use fabric washi tape on one of the boxes. After you have done this step and the glue is dry, give the entire thing another coat of fabric glue on the outside of the fabric and allow it to dry. It will take completely 24 hours to dry.