Chin implants are usually made from silicone, and may be removed at anytime. If the implant is too big or too small, the implant can be exchanged for a more appropriate size for facial balance. Big chins are more masculine, and inappropriate for a woman. Small chins make the nose appear larger, and also inappropriate for a man.
Removing implants is a relatively simple procedure. Generally, one waits at least 6 weeks following chin augmentation to allow swelling to resolve. Appropriate determination of aesthetic results can only be obtained once chin swelling has subsided. First let all swelling resolve, then reassess your chin in conjunction with the entire facial harmony. If you still feel your chin is unbalanced at that time, then consider exchanging or removing the implant.