You could try stretching your hands. That is what I do. It's important to have flexible hands
especially if they are on the more petite side. I do extentions too, exercises on the piano whereby I increase flexibility and strengthen the weaker fingers. For this you can do intervals and reaching exercises. Those books (a dozen a day ) do wonders. The exercises in there will help you to increase the proficiency of your hands. You want to train your fingers to be independant so you will gain
more control. Another thing that helps if you have petite hands, (such as myself) is if you improve the speed of your playing. For example if you have to reach a 9th or 10th quickly you can play it quicker, then jump quickly to that spot. This will require that you know the piano layout really well. But it works for us smaller handed people. You may not be Horwitz, but you can still be amazing! I've seen 6yr olds (very tiny hands) play gigantic masterpieces with the beauty and proficiency of any skilled pianist. Don't give up!!!
