I only used scrap materials from past projects to make this ring tray. If you are interested in some references for a similar project, do keep reading.
I used the case from a box of finished Ferrero Rocher and some 1/2" thick foam sheets. I chose to use some pleather scraps over cotton since its surface can be easily wiped clean.
I marked and trimmed the foam sheet into 1" strips that span across the length of the box. In hindsight, I should have taken into account the extra width once the fabric pieces are inserted. So I recommend making appropriate adjustment for the fabric.
Cut the pleather into the length of the foam strips and measure sufficient width in order to tape wrap around the strips.
Replace all the wrapped strips back into the case. For a more polished look, insert a black panel at the bottom to avoid hollow gaps once the rings are inserted.
How do you store your jewelry?