Blooming size Phrag Stairway to Heaven?

[Bohata]

Last Summer, I got a Phragmipedium Stairway to Heaven from Orchids limited. Does anyone know how big it should bloom? If no one else has this particular hybrid, the parents should give some idea of the range of possibilities. According to the tag, they are Phrag. Popowii and Phrag. wallisii. although there is much controversy over the proper names of the species (for instance, some prefer the name humboldtii to popowii).
Thanks.

[WhiteRabbit]

[Bohata]

More details: The longest leaf is 9" long. It has a new leaf that has a ways to grow, and which is considerably wider, so I think the culture is good.
If nobody can help me with this, and it blooms I'll start a new thread and post a picture or two and mention the length of the longest leaf then, if I remember to.

[No-Pro-mwa]

Wish I could help.