This is a pattern to cover a chocolate egg. It fits comfortably over a Cadbury Creme Egg or Kinder Egg Plastic Middle! I’m sure increasing the hook size a bit would make it large enough to become a real egg warmer - I would guess at a 3.5mm hook, but haven’t actually tried it). I’m sure it would fit over most chocolate eggs of a similar size to a Cadbury’s Creme Egg.

As well as the chocolate egg, you will need a few scraps of DK yarn, a tiny bit of felt for the ears, two beads for eyes, and ideally some embroidery thread for his mouth and whiskers (though I used some black DK yarn). He does stand up without the chocolate egg inside, and could easily be stuffed with something else if you wanted.