Here is a pattern for a mug cozy that has a bottom too, so it also works as a coaster! It will fit an average size mug that is 3" in diameter and 4" tall. See below for instructions on how to easily adjust the size of the cozy to fit other mugs :)
- Cotton yarn
- Size H8 - 5 mm crochet hook
- Button that is 1" in diameter
Rnd 1: 6 sc into an adjustable ring and pull the ring closed (6).
Rnd 2: 2 sc in each sc around (12).
Rnd 3: [Sc in next sc, 2 sc in next sc] 6 times (18).
Rnd 4: [Sc in next 2 sc, 2 sc in next sc] 6 times (24).
Rnd 5: [Sc in next 3 sc, 2 sc in next sc] 6 times (30).
Rnd 6: [Sc in next 4 sc, 2 sc in next sc] 6 times (36).
Rnd 7: working in back loops only, sc in each sc around (36).
Rnd 8: sc in each sc around (36).
Now you are going to work in rows.
Row 9: ch 1, turn, sc in next 32 sc, ch 1, turn (32).
Rows 10-19: sc in each sc across, ch 1, turn (32).
Continue to sc evenly along the opening for the handle until to reach the top of Row 19 on the other side of the opening. Ch 18 (this forms the loop that goes around the button).
Row 20: Continue to sc in first sc on Row 19 and sc in each sc across (32).
Finish off and weave in ends.
Sew on button.
If your mug is a different diameter, you can easily make it smaller or larger by comparing the size of your work to the bottom of the mug after each round. After Rnd 4, place your work against the bottom of the mug to see if you will have the right size after Rnd 5. Or if your mug is larger, you may need to make a new Rnd 7 that is six stitches more than Rnd 6 (i.e., [sc in next 5 sc, 2sc in next sc] 6 times (42)). The bottom of the mug cozy will lay flat if you continue to make each round 6 stitches more than the previous round. Then, when you start making the rows up the sides of the mug, just leave 4 open stitches for the handle. For example, in my pattern Rnd 8 was 36 stitches so Row 9 was only 32 stitches.
If your mug is shorter or taller just adjust the number of rows that you make, fitting the cozy around the mug every so often as you work.