It is now called Will D. It is a fairly new cultivar no definite size info is avail..I have one it is about 4-6 years old ..it is in a pot and I intend to keep it there .. It seems to be rather bushy and fairly wide branched so i figure if planted out it may get pretty large and bushy over tiime depending on how JM worthy your area is... my guess over many years 10-12 ft. both ht.and wdt...but thats just a guess.In a container you can keep it considerably smaller You can containerize just about any JM ( with some larger exceptions) some are MUCH better than others ( containerized Bloodgood EHHHH???!!! )The Will D should do well in a container IMHO. Some think containerizing is best kept to 7-8 years since many tend to go downhill after that...That being said Bonzai are kept all their lives in pots with root pruning...so i think that may or not be tied to how much re-containerizing you do ...David