It seemed to me that a couple of the kids have recently gone through another growth spurt (at least it's at the time of a seasonal shift, so I'd probably need to get them some new clothes anyway) and so I took measurements today.
S is still 5'1" and will probably stick there for the rest of her years in spite of her disappointment. At least she got to be tallest for a few years.
H is now 5'0" at 12. So there is still hope that he'll grow a lot more -- he always ran a bit on the short side so he's been really worried about that.
Z, who is always neck-and-neck with H in height despite two years' age difference, is 4'11" -- but I'm not sure he's had a spurt yet this warming-weather season.
J has grown two inches since I last measured her just before Christmas and now she's a whopping 4'2". She has tall birth parents, so it's possible she may beat out a couple of the boys.
O is still steadily increasing bit by bit and has finally reached 3'10". His birthparents are on the short side and he has always been in about the 15-20th percentile for height and weight, so my prediction is that he'll possibly be in the shortest two of our kids come adulthood.