I used Yarn Bee, Breathe Deep Yarn, with a size G crochet hook, any 4 medium weight yard should produce the same size. You can make 2 or 3 of these with one skein.

ch = chain
sc = single crochet
hdc = half double crochet
fpdc = front post double crochet
fptrc = front post treble crochet
bptrc = back post double crochet
dc = double crochet
sk = skip
dc2tog = double crochet 2 together

Gauge – 13 rows, 10 sts = 2 ½” square

This pattern also utilizes the reverse single crochet stitch. Directions on how to accomplish this stitch can be found here: https://bit.ly/2Rz2d9l