Materials Needed:

  • Worsted weight yarn in appropriate colors (for your chosen Harry Potter theme, e.g., Gryffindor, Slytherin, etc.)
  • Crochet hook (size depends on your yarn weight, typically between H/5.00mm and G/4.00mm)
  • Yarn needle
  • Buttons or fasteners (for closure, optional)
  • Scissors


  1. Start with a Slip Knot: Begin by making a slip knot and then chaining enough stitches to wrap around your mug comfortably. This will be the base of your cozy.
  2. Single Crochet Rows: For the main body of the cozy, you can use single crochet (SC) stitches. Depending on your mug’s size, you might need to increase or decrease stitches to ensure a snug fit.
  3. Design Elements: To create a Harry Potter-themed design, you can incorporate color changes and stitch variations. For example, if you’re making a Gryffindor cozy, use red and gold/yellow for the colors and create the house’s emblem or some lightning bolt motifs for the Harry Potter touch. You can do this by changing colors and using simple embroidery techniques.
  4. Button Fastener (Optional): If you want to add a button fastener, crochet a small loop on one end of the cozy and attach a button to the other end. This will allow you to secure the cozy around your mug.
  5. Finishing: Once you’ve completed the desired length and design, finish off your work by tying off the yarn and weaving in any loose ends with a yarn needle.

Please note that you may need to adjust the pattern to fit your specific mug’s dimensions and your design preferences. Additionally, since I don’t have access to patterns beyond my last update in September 2021, I recommend checking crochet pattern websites, forums, or social media groups for more recent Harry Potter-themed mug cozy patterns, as there might be new and creative designs available online since then.