you mean length? you can check the tracker of this app, pero estimated lang yun baby size na andun. if you want to know the actual size of your baby, pa-ultrasound ka po.
Since you signed up on the theAsianparent app, get the advantage of using the baby tracker that wat you get to know your baby's development.
The only way to know or estimate is through ultrasound or you can use baby tracker here in this app po :-)
If pregnant, try to have an ultrasound