I don't usually frame my pieces. Partly that's down to laziness, but it's also hard to get hold of box frames without spending a lot of money. I can turn a regular frame into a box frame, but that's a pain in the ass. In this case though, I found a box frame for $5 in a second hand store. Win! It had some seashells and suchlike glued inside it, so I scraped those off with a knife and covered the back of the frame in fabric.