These are just the cat ears, not any other part of instructions. The base I used for this amigurumi is the pattern called Love Bunnies, which can be found on Ravelry here.

These ears can be added to hats or amigurumi to make them extra cute.

The website I originally listed this on has disappeared, but here are the instructions:

1. magic ring with 6 stitches (6)
2. inc (12)
3. sc (12)
4. 5 sc, 7 inc (19) 5-9. sc (19)
5. 9 sc, 2tog, 6 sc, 2 tog (17)
6. sc (17)

The ears easily form because of the shaping and will keep their shapes for years.