Row 2: this row is worked in the 3rd loop only (backside of the chain), sc in the 2nd chain from the hook and across, chain 1, turn 
Row 3: sc blo across, chain 1, turn 
Row 4-17: repeat Row 3 
Fold the cuff in half, so the 5th stitch of the first row is now located on the top right-hand corner.
Slip stitch to the 5th chain of row 1 (see Figure 2)
Continuing around the top of the cuff:
Round 1: sc around the top of the cuff (beginning in the stitch to the left of the ss)  (see Figure 1)
Round 2: 1 sc in blo, of each of the first 14sts, 1 sc in 3rdloop only of each of the last 3 sts 
Round 3: 1 sc in 3rd loop only of the first 14 sts, 1 sc in both loops (normal crochet) of each of the last 3 sts 
Round 4: (1 hdc in each of the first 3 sts, 2 hdc in the next st) 4x, 1 hdc in the next 1 st 
Round 5-7: hdc around 
Left Hand Round 8: 1 hdc in each of the first 5 sts, skip the next 4 sts, 1 ss and 1 hdc in the next st (10th st), 1 hdc in each of the next 11 sts  (*ss counts as a stitch)
Right Hand Round 8: 1 hdc in each of the first 15 sts, skip the next 4 sts, 1 ss and 1 hdc in the next stitch (20th st), 1 hdc in the last st  (*ss counts as a stitch)
Round 9-13: hdc around  (*remember that ss in round 8 counts as a stitch)
Round 14: (hdc2tog) 9 x  *I stitch this round tightly*
Round 15: hdc around 
Round 16: sc around 
Round 17: ss to the first st, FO, leaving a long tail for sewing; cut the yarn; turn the mitten inside-out and weave the ends of the yarn through both loops of the sc round; tighten firmly and weave in loose ends
With the thumb opening on the left-hand side of your work, join the yarn with a slip stitch, to the stitch just to the left of the palm of the mitten (Figure 3).
Round 1: 1 hdc in the same st you ss to, hdc around [6 hdc + 1 ss]
Round 2: ss to the ss of round 1, 1 hdc in each st around (except the one you ss into) [6 hdc + 1 ss]
Round 3: ss to the ss of round 2, 1 hdc in each st around (except the one you ss into) [6 hdc + 1 ss]
Round 4: ss to the ss of round 3, sc around, ss to the first ss of round 4 [6 sc, 2ss], FO, leaving a tail for sewing; cut the yarn; turn the mitten inside-out and weave the ends of the yarn through both loops of the sc round; tighten firmly and weave in loose ends
Create an adjustable loop (AL).
Round 1: 12 hdc into the AL (find your button and make sure that it fits into the centre-hole created by the 12 hdc in the AL – you can tighten your loop but ensure you do not tighten it so much that your button no longer fits through)
Row 2: chain 1, sc once into the 1st hdc of Round 1, chain 1, turn 
Row 3-6: 1 sc in each of the 3 stitches you created in row 2, chain 1, turn 
Row 7: sc around the entire closure, ss to the beginning sc of the row (do not finish off)
Attachment of Closures:
Please see the diagram and photo below for assistance.
Place the closure above the ‘valley’ row on the furthest edge of the cuff. Join the closure with a slip stitch before single crocheting through the closure and around the post stitch of the ‘valley’ row. Crochet (sc) along the entire edge of the closure and then slip stitch into the cuff before cutting and weaving in the ends of the yarn.
Next, attach your button. I also attach this in the valley area of the cuff.
The Third Loop. Some of my patterns will ask you to work in the “third” loop. This is referring to the stitch located behind (and slightly to the left-side) of the back loop. If you twist your stitches slightly you will see it hiding back there. I find it easiest to grab this loop by inserting my crochet hook through the back loop (from the back) and then bringing it back out slowly on the left-hand side to ‘hook’ the third loop with the ‘hook’ part of the crochet hook.