If you would like to make a custom tree skirt, there are many, many patterns different styles of patterns available. They also make wonderful gifts for a newly married couple. I have searched the internet for patterns to make Christmas tree and linked them below for your convenience!
How to Make Christmas Decorations
This site has instructions for making three simple tree skirts: one from fleece embellished with snowflakes and snowmen and two from felt, one embellished with angels and the other with gingerbread men. No sewing required.
How to Make a Glam Christmas Tree Skirt
This site has instructions for making a basic tree skirt.
Quilted Tree Skirt
This tree skirt is quilted and is square rather than round. It is embellished with trees and stars. This is one of my favorites!
Video: How to Make a Custom Christmas Tree Skirt
This helpful video shows the steps in making a tree skirt.
This pattern is from Amy Butler and has a cute button closure. This link opens a .pdf file that requires that you have Adobe Reader.
Stars All Around Tree Skirt
This pattern makes a quilted tree skirt with pieced stars on it.
Tutorial: Patchwork Christmas tree skirt
This tutorial shows how to make a cheery patched tree skirt.
Speedy Spiral Christmas Tree Skirt
A strip quilted tree skirt that has a bargello effect.
Coordinating Holiday Setting
This link opens a .pdf document with patterns for several holiday accessories including a tree skirt.
Gingerbread Patchwork Tree Skirt
This pattern combines appliqué and paper piecing to create a square tree skirt.
Christmas Tree Skirt
This pattern uses pre-quilted fabric to make this tree skirt.
Ho Ho Ho Tree Skirt
This quilted tree skirt is embellished with jolly Santa faces.
Make a Tree Skirt from a Bridesmaid Dress
The name says it all!
Christmas Tree Skirt from Table Runners
This project cleverly converts pre-made table runners into a festive tree skirt.
Rag Quilt Tree Skirt
This link opens a .pdf document with patterns for three styles of rag quilt tree skirts for the country look.
Plaid-Trimmed Tree Skirt
This pattern uses two squares overlapped to create a star pattern.
This tree skirt is made from boiled wool and embellished with ribbons.