How to Sew a Mug Cozy

Close-Up Of Drink On Table

Jennifer Henriksen / EyeEm / Getty Images

Project Overview
  • Skill Level: Intermediate
  • Estimated Cost: $30 to $40

How many times can you put a cup of coffee in the microwave to reheat it? You sit down at the computer with a nice hot cup of coffee and, before you know it, the coffee is cold. The solution is to keep it warm to begin with by having a mug cozy on your cup of coffee. Personalize your mug cozy to make it a great gift, or make a set to keep at home for guests.

What You'll Need

Equipment / Tools

  • Rotary ruler
  • Pins
  • Scissors
  • Sewing machine
  • Needle


  • Fabric scraps
  • Batting
  • Thread
  • 2 to 3 inches 1/2- to 1-inch-wide hook and loop tape
  • Thread


  1. Make Your Pattern

    Mugs come in many sizes and shapes. This mug cozy can be custom-made to your measurements or adjusted for a "close" fit via the strap that goes through the handle. Two sizes are offered here.

    • For a large mug that is 19 inches around and stands 5 inches tall, the body of the pattern piece is four inches by 18 inches. For the tab, measure 3/4 inches down on a 4-inch edge, extend a line 3 inches out from the four-inch edge. Measure down 1 1/2 inches from the 3-inch line and create a rectangle that forms the tab at the end of the pattern piece. This will wrap around the mug under the handle.
    • For a medium-size mug that is 12 inches around and stands 4 inches tall, the body of the pattern piece is 11 inches by 3 inches. For the tab, measure 3/4 inches down on a 4-inch edge. Extend the line 2 inches from the 3-inch edge. Measure down 1 1/4 inches from the two-inch line and create a rectangle that forms the tab at the end of the pattern piece This will wrap around the mug under the mug handle.
    • For a smaller mug that measures 10 1/4 inches around and stands 3 3/4 inches tall, make the pattern the same as the medium size, except make the body of the pattern 9 1/4 inches by three inches.


    Rotary rulers are a great way to assure that you are drawing a truly square pattern piece.

    Draw the pattern to sew a mug cozy
  2. Cut the Fabric

    Lay the pattern piece out using a long body side edge as a grainline. Lay the fabric over the pattern and cut it out. When cutting out the fabric, place the fabric right sides together, so you will have two pieces that line up correctly later.

  3. Place the Hook and Loop Tape

    On the backside of the fabric, along the end without the tab, sew the hook tape 1/2 inch from the edge, centered on the short edge. On the right side, front of the cozy, sew the loop tape on the tab, centering it on the length of the tab.

    A photo showing the placement of hook and loop tape when sewing a mug cozy
    Placing the hook and loop tape on a mug cozy Debbie Colgrove, Licensed to
  4. Pin the Fabric

    Place the right sides together of the two fabric pieces, matching all of the edges. Lay the batting under the fabric and align the edges. Pin all of the layers together.

  5. Sew the Cozy

    Sew the edges together using a 1/4-inch seam allowance, leaving a 3-inch opening in the bottom of the body of the fabric toward the end with the tab, to make it easier to turn the fabric right side out.

    Trim the corners, clip the corners, and grade the seam allowance. (The red lines in the photo show trimming and clipping locations.) Turn the fabric right sides out through the seam opening. Turn in the un-sewn seam allowance, pressing the seam allowance inside the cozy as if it were sewn.

    mug cozy in progress
  6. Finish the Cozy

    Hand-sew the opening closed. Press well so the seams are at the edges. Top-stitch the entire edge, keeping the stitching an even distance from the edges. 


    Most batting requires stitching every so many inches (information found on packaging). To stabilize the batting and allow the cozy to be machine washable, sew a straight line halfway on the length of the cozy from long edge to long edge. If more stitching is needed, be creative and decorative.