According to measurements in the catalogue, it is about 17-17.5 inches tall.
Does that mean that dolls are not fully able to stand up in the tent?
Nope, the tent is too small for them to stand up in. They have to lie in it, or "crawl" into it. It's really out of scale and tiny. I mean, just look at how wide the steps are - not nearly big enough for a doll to sit on, like is described in Molly's book.