How tall should a 3 month old baby be? My baby seems really tall, I reckon about 65cm.

It varies, gender, depending on genetic make up (is baby of mixed parentage) and also how heavy baby was when he or she was born. Generally baby should be 55-60cm by 3 months. My friend's half caucasian, half chinese baby is about 58 cm and he is only 2 months old.