Hi All--Stirfry in our Friendship Garden is located in spot that is near an opening in the forest canopy and so it gets a bit more sun than most of the other varieties there. Unfortunately, the photos I have are not the best but they do show the growth of the plant from 24x11 in 2006 to 33x14 this year. It will have little trouble passing the 20 foot rule when it hits maturity at somewhere between 24x12 (according to the registration info) and 72x26 (the top size listed by Zilis).
Registry - http://www.hostaregistrar.org/detail.php?id=6218&Variety=Stirfry
MyHostas - http://www.myhostas.be/db/hostas/Stirfry
Hosta Library - http://www.hostalibrary.org/s/stirfry.html