If you want something that absolutely will not be grown out of,an 11 inch wheel isn't quite big enough actually
A 12 inch wheel would be the only size that cannot be grown out of,and of the 12 inch wheels available the Silent Runner is best.It'll cost more than an 11 inch Wodent Wheel but it is a superior wheel to any other on the market,in safety and in quality.You probably won't spend that much on shipping for a Silent Runner either!