I have this tree that my son gave me it is growing and has an few blooms but the leaves are very small not at all like it was when I got it.
Can someone help?

Most Rose of Sharon (Althea) leaves are small mine has been covered in blooms since spring. I don't know what you were expecting this plant is not a Rose it is closer related to Hibiscus (Hibiscus syriacus)which some of them have small leaves and others have large leaves. Hope this helps you some.
Jimmy

Hello Tigger,
Welcome to The Garden Helper's Forum.....
We're very glad you found us...

Just so you know I'm going to move your post
in to the PLANTS AND FLOWERS SECTION....

I think you'll end up with more responses to
your question....

Do you happen to have a picture of your plant?

Here's some more information:
http://www.garden.org/plantguide/?q=show&id=2102

Is it still in a pot? My guess is that if it is, it has now outgrown it's pot and maybe that's why the leaves have gotten smaller. The above link has some advice about how to prepare a planting site for it.

If it was root-bound when it was planted in the ground, this might also cause a stunting effect. If this is so, you might try to lift it out of the ground and gently unwind the roots. Then make it a larger hole and settle it back in, watering deeply. That might get it going full strength again next season.