Bag is worked in continuous rounds; do not join and do not turn at the end of rounds. Use a marker to indicate the beginning of round, and move marker up as work progresses.
Chain 3; join with slip st in first ch to form a ring.
Round 1 (RS): Ch 1, work 9 sc in ring; place marker for beginning of round, move marker up as work progresses.
Round 2: 2 sc in each sc around—18 sc.
Round 3: [Sc in next sc, 2 sc in next sc] 9 times—27 sc.
Round 4: [Sc in next 2 sc, 2 sc in next sc] 9 times—36 sc.
Round 5: [Sc in next 3 sc, 2 sc in next sc] 9 times—45 sc.
Round 6: Sc in each sc around.
Round 7: [Sc in next 4 sc, 2 sc in next sc] 9 times—54 sc.
Round 8: Sc in each sc around.
Round 9: [Sc in next 5 sc, 2 sc in next sc] 9 times—63 sc.
Round 10: Sc in each sc around.
Round 11: [Sc in next 6 sc, 2 sc in next sc] 9 times—72 sc.
Round 12: Sc in each sc around. Do not fasten off.
Round 13: Working in front loops only, sc in each sc around.
Round 14: Sc in each sc around.
Repeat Round 14 until sides measure about 27"/68.5 cm.
Last Round (drawstring channel): Ch 2 (counts as hdc), hdc in next sc, ch 1, sk next sc, *hdc in next 2 sc, ch 1, sk next sc; repeat from * around; join with slip st in top of beginning ch. Fasten off.
Row 1: Slip st in second ch from hook and in each remaining ch across. Fasten off.
Row 1: Sc in second ch from hook and in each remaining ch across, turn—8 sc.
Row 2: Ch 1, sc in each sc across, turn.
Repeat Row 2 until strap measures about 27"/68.5 cm. Fasten off.
Weave drawstring through spaces in last round of bag. Tie ends together. Sew one end of strap to first row of side of bag. Sew other end of strap 5"/12.5 cm below top of bag.
Using yarn needle, weave in all ends.