Video Tutorial

Round 1: 12 double crochet magic ring. Slip stitch
Round 2: 1 increase around. Slip stitch
Round 3: *1 double crochet, 1 increase* Repeat around. Slip stitch
Rounds 4-13: 1 double crochet around. Slip stitch (Change color in round 6)
Round 14: 1 double crochet around, 1 double crochet extra in the beginnig stitch. NO SLIP STITCH
Rounds 15-16: 1 increase, 1 double crochet to the last stitch, 1 increase. NO SLIP STITCH
Rounds 17-18: 1 treble increase, 1 double crochet to the last stitch, 1 treble increase
Rounds 19-25: 1 double crochet around 
Fasten off
Sew the heel part

Decoration

Round 1: 12 double crochet magic ring. Slip stitch
Round 2: 1 increase around. Slip stitch
 

Sew decoration and make details