My glue recommends that I use a jade stone so I have the regular size ones. But because I do travel sometimes and when I do, i don't know how much space I will be working with so it's just nice to have a smaller stone so it doesn't take up too much room. I mean if you have the glass tray from iLevellab then it obviously requires the mini, but if you don't have the tray, it's not really necessary.