Start with a slip knot and chain 22
Single crochet into the 2nd chain from the hook and each chain across (21 SC)
CH 1, turn, SC in each stitch across.
Continue rows of SC until your work is about 11 inches long.
Make a SC decrease. SC in next 17 stitches across. Make a SC decrease.
Chain 1 and turn. Make a bean stitch in 1st stitch, CH 1, skip next stitch. Repeat across.
Ch 2, turn. Make a bean stitch into the the bean stitch in previous row, CH 1, skip stitch, repeat.
Continue until you have 6 rows of bean stitches. Fasten off yarn and weave in ends.
Fold the lower half up to the last row of SC. Stitch sides together.
Repeat on other side. Weave in ends.
Make a slip knot and chain 100 (or as long as you would like the strap to be).
Slip stitch into the 2nd chain from the hook and each chain across.
Stitch one end of the strap to the bag.
Repeat on other side
Weave in ends. Turn bag inside out.