my bb only started walking on her own when she was 13months old. my friend's baby who is now 13 months old is still not walking properly yet so there is no need to be anxious - she will walk when she is ready
It depends individual. My bigger son start walking without aid around 11 mths while my small son start walking with aid around 13 mths and walking unstable until 2 yrs old ( sometimes fall down when he walk fast )