Here is a photo of my Stevia Plant, which is about 4 foot high....

I took these photos after I harvested some leaf to dry in the dehydrater......After drying to crispy, I then put it in the mortar and pestle to grind up and sieved it...grinding the larger bits again, then sifting again......

I got a fair amount for my first time, but I have plenty more in my garden that I can harvest, I cut it back to about 15 cm off the ground after it produced seeds for me last year....It grew really tall after that as you can see.