My question is are their different varieties of African Violets. Several of my plants have huge leaves and others small leaves. thank you in advance for any advice you may be able to give me.
As long as you are sure they are of the Genus Saintpaulia I would say the size of the leaves isn't a problem. Do you happen to know a species name for them? There are many species and then when you add in the 'Cultivars' and the hybrids, there will be a difference in leaf size as well as flower form.