Decorative Yarn Shapes Materials Corrugated Card Christmas Shapes Metallic Yarn Ball of 20g Sequins in a Jar Hologram Round Supertac Glue Clear Adhesive Tape How to make a Decorative Yarn Shape Step 1. Wrap Metallic Yarn around a Corrugated Card Christmas Shape. Step 2. Use Adhesive Tape to secure the yarn in place at the back of the shape. Step 3. Make a small loop with the Metallic Yarn so that it can be hung. Secure to the back of the shape with Adhesive Tape. Step 4. Glue Hologram Sequins to the front of the shape with Supertac.