From Twinkie Chan’s Blog:

What You’ll Need

• Worsted weight yarn is the easiest to use for beginners, but this pattern can be used for any weight yarn.
• I hook for worsted weight
• 1 ½ inch Styrofoam balls, or you can also use Polyfil stuffing
• scissors
• tapestry needle
• optional: ornament hooks, gold or invisible thread for hanging ornaments, beads, pompoms, thin ribbon

Notes

• Gauge isn’t really important in this project. For a 1 ½ inch Styrofoam ball, you want your crocheted rectangle to be 4 ½ inches wide and 3 ½ inches long. See template at the end of the pattern.