Height is alright based on the fact if she was around 50cm at birth. Go according to growth charts. Birth weight, height and subsequent recordings are required to give an accurate comment. Sleep differs on each child. At least 7-8 hours of sleep is required ideally. If child is active, playful, achieves all milestones developmentally and attentive during the day, then no issues. For any queries, book an online consultation with me. I am a lactation consultant, IYCF (Infant and Young Child Feeding) nutrition expert with an interest in Childhood Infections and Vaccinations. Take care!