I had some leftover awesome-looking sari yarn and thought my phone looked cold even though I live in New Orleans. Alas, my creativity led me to do something about both problems at once.
Yarn: I used Berocco Idol which is a variegated sari yarn. It is theoretically bulky, but I found that it worked up more like an aran weight or heavy worsted weight yarn. You can adjust the pattern to match your yarn weight (add/remove beginning chains and add/remove rows).
Materials: Crochet hook size US H (5.0 mm) or appropriate size for your yarn, yarn needle (to weave in ends)
Abbreviations and Special Stitches
ch = Chain
dc = Double crochet
hdc = Half double crochet
sc = Single crochet
sc2tog = Single crochet 2 together
sl st = Slip stitch
st = Stitch
Note: Throughout pattern, the chains at the beginning of a row do not count as the first stitch.
Beginning chain: Ch 10. Row 1: Sc 2nd ch from hook and across (in back loops). Sc 3 more times in last ch. Rotate to work back across in the front loops to the beg ch. Sc 2 more times in the beg ch. (Net stitches: 4 total sc in the beginning and ending ch, and 2 sc on either side of each of the other ch for 24 total sc). Sl st to top of beginning sc. Row 2: Ch 1, sc in same st and around, sl st to top of beg sc (24 sc).
After row 2, test the size of your cozy by inserting your phone. If it is too big, start over with a smaller beg ch. If it is too small, start over with a larger beg ch.
Row 3: Repeat row 2. Row 4: Ch 2, hdc in same st and around, sl st to top of beg hdc (24 hdc). Row 5: Repeat row 2. Row 6: Ch 3, dc in same st and around, sl st to top of beg dc (24 dc). Rows 7-14: Repeat rows 3-6 two times. Row 15: Repeat row 2. Do not fasten off - continue with Flap row 1...
Flap row 1: Ch 1, sc in same st and next 9 st (10 sc). Ch 2, turn. Flap row 2: Hdc across (10 hdc). Ch 1, turn. Flap rows 3-6: Repeat rows 1-2 two times. Flap row 7: Sc across first 8 st then sc2tog in last 2 st (9 st). Ch 1, turn. Flap row 8: Sc across first 7 st then sc2tog in last 2 st (8 st). Ch 1, turn. Flap row 9: Sc across first 6 st then sc2tog in last 2 st (7 st). Ch 1, turn. Flap row 10: Sc across first 5 st then sc2tog in last 2 st (6 st). Ch 1, turn. Flap row 11: Sc across first 4 st then sc2tog in last 2 st (5 st). Ch 1, turn. Flap row 12: Sc across first 3 st then sc2tog in last 2 st (4 st). Ch 1, turn. Flap row 13: Sc across first 2 st then sc2tog in last 2 st (3 st). Ch 1, turn. Flap row 14: Sc in first st then sc2tog (2 st). Ch 1, turn. Flap row 15: Sc2tog. Do not fasten off. Make the wrap cord by chaining for about 1 yard. Fasten off. Keep end tail to tie off pom-pom.