This one is 8x16.
Planning....
Building....
Filling....
Finished (but not planted)....
The only thing I would do different on this one (above) is I would make that center divider a full wall. I could have saved 3-5 bags of dirt if it was a wall. I made another one, the weekend after I did this one, and split it lengthwise. So it's 8x16, but 4x16 of it is one height, and 4x16 of it is higher. Don't know where those pics are. This will eventually be another tutorial -- you might have just given me the push I needed to write it.