Three pieces. One for the Home button, one for the front and one for the back which also wraps round the sides and corners.
I've put two onto my touch and my son's touch. The first one took 40 minutes, it helped when I put my glasses on 🙄 and the second took 15 minutes.
They are not hard to put on, just a little fiddly at times. Make sure you use plenty of the supplied fluid and keep your hands and working area CLEAN!!