Just make sure the heels she wears are best for your feet and let her choose after a parental and daughter discussion. The fit should be stylish, not tight. The height of the heel should not be higher than she can comfortably carry. She should do a lot of exercise with them at home before any public ventures so that the heels feel more like graceful leg extensions rather than obstacles that stifle movement. The more she is free to experience the high heels she chose, the more she will feel comfortable sharing her experience and coming to you for advice when needed.