Wow Meow (cat ears for costumes)
You’ll need a little bit of yarn in two colors, a store-bought headband and about an hour and a half to make your own set of cat ears.
If you don’t like the bulky yarn choice in your stash, just hold some worsted double (double the recommended amounts - they are already generous so don’t panic if you are short). The pictured black ears are a doubled worsted of unknown origin, the orange ones are bulky hand spun.
from http://www.etsy.com/shop/SpinSpanSpun yummers