Video Tutorial

Round 1: 1 single crochet magic ring
Round 2: 1 increase around (12 stitches)
Round 3: *1 single crochet, 1 increase around* Repeat around (18 stitches)
Round 4: *2 single crochet, 1 increase around* Repeat around (24 stitches)
Round 5: *3 single crochet, 1 increase around* Repeat around (30 stitches)
Round 6: *4 single crochet, 1 increase around* Repeat around (36 stitches)
Rounds 7-9: 1 single crochet around (36 stitches)
Round 10: 1 increase around, 35 single crochet (37 stitches)
Round 11: 1 single crochet, 1 increase around, 35 single crochet (38 stitches)
Round 12: 2 single crochet, 1 increase around, 35 single crochet (39 stitches)
Round 13: 3 single crochet, 1 increase around, 35 single crochet (40 stitches)
Round 14: 4 single crochet, 1 slip stitch, chain 12, 1 slip stitch on the next sc, making a loop. Repeat 3 times *4 single crochet, 1 decrease*, 2 decreases, repeat 2 times * 4 single crochet, 1 decrease*
Round 15: 4 single crochet, 18 single crochet in the loop, continue making single crochet to the marker, remove the marker and make single crochet to the loop.
Round 16: Make the crab stitch around (leaving the loop)
Cut the yarn and leave a long tail. Wrap the loop with the yarn. Fasten off