I love that movie! It charmed the heck out of me, so I decided to make something of my own.
What they are are just really mini plushie type things. Made of three small pieces of felt and stuffed full of cotton, these Totoro buttons are about an inch and a half in length. On the back, I sewed a button on them, so you would wear them as an accessory, of some sort. I would like to think that I came up with the ingenious button idea, but I don't know. D:
Edit: Since people have been asking about it, I'm going to say that I'm not selling these at the moment. However, if there is enough demand for them, then I will. ;D
//happyflail.