What does small and frail wrists indicate? does it mean im still growing? no one in my family has tiny wrists except for me and my sister shes 12

Variant of normal: Small children have small wrists, but if they appear frail it is possible that the maturation is delayed. This can be determined by an x-ray of the wrist to assess the age of the wrist bones relative to your age. If there is a significant delay, a referral to a pediatric endocrinologist is appropriate. The frailness can also mean that the long bones need to be x-rayed.