I ordered this custom made pot from Sara a few months ago. It arrived yesterday, and will be used next month for my Sumo Silverberry. Outside dimensions are 18" x 8".
I wanted a round pot with no feet, because the silverberry has several "fronts". I wanted a strong pot that I could use at any viewing angle I choose.
The link is to Sara's online catalog. 13r is the pot mine is based on.
http://www.redwing.net/~daalms/round.html
Mike
Added later: image on right is a vrtual of how I hope it will look after repotting.