Slightly smaller after giving birth. Then it deflates like a balloon. Maybe two weeks? But everyone is different!

Everyone's body is different but it goes away. The first couple days after my son was born I looked like I was like two months pregnant, just a little bump. Then it went away after like two weeks and I was back to my normal pre pregnancy body. Then about two months later my hips widened. Everyone is different and it kind of depends on if you were in shape before.

I just didn't know if because the baby's not there anymore to push on it if it'd just be a roll of fat instead of a basket ball

It may get a little smaller after birth, but more than likely will stay about the same due to the uterus size and slowly go down. But I know a girl who just had her baby and the next day her stomach was as flat as can be. Everyone's different.

Slowly go away, I remember my belly hung like a kangaroo pouch for a while.