Mounting clip for 30x30 color squares

I wanted to have a set of swatches for filaments and I picked the 30x30 swatches by Tomany found here:

https://makerworld.com/en/models/214478-filament-swatches

Then I needed to attach them to my my storage boxes, so I put this clip together. I glue these to the front of the box, they work for either end up. The back has a curve to match my boxes but I have included a flat back version as well. This is my first creation, I welcome feedback.