When you're decorating a Christmas tree with ribbon mesh, you'll want to start by attaching the ribbon mesh to the bottom of the tree. The ribbon mesh should be draped around the tree in a circular pattern, with each layer of the ribbon mesh slightly overlapping the previous layer. Once you've covered the bottom half of the tree with ribbon mesh, you can begin to attach the top half. Make sure to secure the ribbon mesh tightly to the tree so that it doesn't slip or fall off.