interesting... we looked at three prospective donors at the same time and compared. And,we did get height and weight (as well as eye and hair colors, health history,ethnic background, and a bunch of other stuff) for the parents, siblings, grandparents,and sometimes aunts and uncles for each donor we looked at. I believe all this was reported by the donor,so it may not be entirely accurate. I could not accurately estimate someone else's weight! But, at least I assume she knew if they seem average, thin, heavy, or extremely heavy, and could give a weight in the approximate range. Though with the men,especially,I wondered if some extra weight might be because they are very muscular? We just don't know. (The information about herself was all from her actual health records,and thus accurate.)
Anyway,I guess different clinics have different procedures. I wonder if you could call and get more information? I called about some information that wasn't included(the results of one woman's previous cycle were missing,and another's psychological exam results were missing),and they got it for me within a few days.
You are right that you never know when a better donor will come along,which makes it hard. Good luck with your decision! In the end,it is your child, so you have to go with what feels right with you. Part of the reason I chose the one I did over another who also fit most of my criteria (and likely would have been fine) was that she looked like she could be my sister,and I felt like she would fit in with my family in both looks and personality. I thought if I knew her, I would like her. So, although I had a lot of ideas going in about what I was looking for (no genetic health issues, educated, written answers seem intelligent, similar ethnic background,blue eyes,fair skin--like me--),it came down more to the one that felt right. Though she fit most of my other criteria, also, but not all. No one fit everything-- I don't have a twin!