Well after getting an actual measurement I have another 10" to work with and visited Cory's Hosta Gardens here in SW Ohio.
My 3 selections are larger than what I really wanted but suitable for this year and perhaps a few so in the meantime I will be searching for contrasting varieties that to hold within 28"...
Great visit although I failed to take my camera. Mr. Cory is a great guy with a true passion for the plants he grows and I met a very nice couple of gardeners that hybridize daylilies. They're nearby as well so again great visit! I bought one pre-potted variety in a manageable size "First Frost"
And Mr. Cory, 89 years young dug "September Sun"
and 3rd and last "Captain Kirk"---I want one for myself!
Again I'm pretty sure I'll be looking for more compact varieties to replace these choices but when an 89 year old gardener shakes his head "no" and says "Eh, If you want one I'll sell you one" I lean towards giving in to plants he points to! He's a great guy!