When I started throwing on the wheel, I could only center a small amount of clay, hence, small pots. I had lots of fun with it though, because it was very easy to manipulate their shapes to get good proportions without totally losing control of the clay. They are great for planning decorations on larger pots also. I am finding that it is not that easy to translate a little vase of 3 inches into a vase of over 8 inches. A subtle curve this way or bulge that way, makes all the difference of whether it is graceful or clunky. Always something to work on. Have a great weekend.