This is a Decagon Box that I have created in SCAL. You can grab the download file HERE. The box requires at least six scores around the bottom. The box on the right in the above photo has six additional score marks where the scallops join the rectangles, the box on the left just contains the bottom six scores.
Three of the sides you pull the ribbon down through the holes. The other three sides, bring the ribbon up through the holes and then tie in a bow.