how big will my plants be after flowering ?

new to this they are indica dominant 80/20 .. put into flower just over a week ago they are 12 inches tall at moment ? on average what will i get out of them. they have also been topped ... !!! thanks they are also under a 400 watt duel spectrum bulb

pic here

bout a pound

i wish haha cumon how much on average would u get ?

the general rule is 30% or more, sometimes a lot more. sativas tend to stretch more than indicas.
it also makes a good bit of difference what light you vegged under and what light you're flowering under. the bigger the difference in K value, the more stretch it will cause.

as far as yield, it's very hard to predict, there's so many things we don't know, just remember, you get better each time...

or you quit and buy weed