This is actually a combination of two free crochet patterns I found on the internet to make my own black cat that looked a bit more balanced, with some other tweaks.

To give credit where credit is due:
Basic Crocheted Flat Circle With Solid Center
Black Cat Fridgie

Materials:
Black Worsted Weight Yarn
US Size G Hook
Tapestry Needle
Small googlie eyes
stick-on magnet strip
White glue (like Elmer’s)

Finished Size
Body Circle: 1.5 inches in diameter
Head Circle: 1 inch in diameter

Abbreviations:
ch = chain
ea = each
rnd = round
sc = single crochet
sl st = slip stitch
hdc = half double crochet

Body and Tail:
To Begin: Chain 2.
Rnd 1: 6 sc in 2nd ch from hook. Sl st in first sc, to join.
Rnd 2: ch 1, 2 sc in ea sc around. Sl st in first sc, to join. (12 sc)
Rnd 3: ch 1, (sc in next sc, 2 sc in next sc) around. Sl st in first sc, to join. (18 sc)
Tail: ch 6, sc in 2nd ch from hook and in remaining chs. Sl st in next st on circle. Fasten off.

Head:
To Begin: Chain 2.
Rnd 1: 6 sc in 2nd ch from hook. Sl st in first sc, to join.
Rnd 2: ch 1, 2 sc in ea sc around. Sl st in first sc, to join. (12 sc)
Rnd 3: ch 3, hdc in 3rd ch from hook. Sl st in next two sts. Ch 3, hdc in 3rd ch from hoom. Sl st in next st. Fasten off.

Finishing:
Using tapestry needle and loose yarn ends on the head, fasten the head to the body as shown in the picture and secure all loose ends. Stick the magnet on to the back of the cat. Use the white glue to fasten the googlie eyes on to the cat’s head.