Hai! Aira Nur Atiqah dah 3 bulan 3 hari, so she's still very much in the newborn phase, it's completely normal kalau size dia tak sama dengan baby lain sebab setiap baby develop at their own pace, especially if she was premature or had different birth weight. A few of my mum friends were worried about the same thing, tapi masa check-up doktor je semua okay, jadi best yang you bring her to the clinic so the doctor can measure her growth properly and make sure she's feeding well and gaining weight nicely. Jangan worry too much lah, 3 months is still very early!