Each strain is different. But a good rule of thumb is the the plant will double in height during flower. Make sure to measure from the bottom of your light to the top of the plant. You want to make sure the buds as they grow stay away from touching or getting to close.
I saw you did some topping. Thats the best way to keep the plant wide, I don't see a scrogg net, but that's another good way to keep them low. Tuck the plant horizontally through a scrogg net to grow the plant out more than up.