Iim close to thirty. my half body parts are adult size and some half are like child size. i look abnormal. my size is hard to find anywhere.

See your doctor...: Have you been to a doctor since puberty? It would be abnormal to have half of your body remain "child sized" & the other half grow normally. It is hard to imagine that if your appearance is as dramatically imbalanced as your description that it wasn't noted by a physician in previous exams. See your doctor to evaluate your concerns and determine if any medical workup for cause needs to be done.