To put mesh ribbon on a Christmas tree, you can follow these steps:
1. Start by picking out the ribbon. Choose a color that will complement the tree's color scheme and any other decorations you plan to use.
2. Measure the length of the ribbon you will need. You can use the circumference of the tree or measure the height of the tree and use that as a guide.
3. Cut the ribbon to the appropriate length. You can either make it one long piece or cut it into smaller sections.