Some folks do love their banding.....

Here is a way of using grosgrain ribbon that I can live with.

Notoriously annoying to apply, grosgrain is easy to work with as a binding, which in essence is what this banding is.
The face fabric and lining were cut to the exact finished size; the pink ribbon was top-sewn to the front and then wrapped to the back and secured with hand-stitching.

A little scrap of ribbon covers the ends of the board. just in case they are visible.