... you have to follow the rule of 5's ...
... for example, even for single women, at 5'5", she should hit the scales at most at 125lbs ... for every inch shorter, subtract 5lbs, every inch taller, add 5 lbs ... up to a maximum of course ...
... now for age, you do have to consider children ... at age 20, no problems w/o kids ... with a kid, maybe, 2 kids, problem ... at 25, still a problem, but there's a possibility ... with 3 kids and 25yrs old, ummm... no, and at 30, she's still not out of the woods with 3 kids ... with 4, no way ... when she turns 35 - she's dating material ... as the kids start moving out later one ... then you can consider more ... if she has more kids than that, forget it ... you won't win ... at 5 kids ... forget it ... at 50 forget it ...
... anything else under 18 is protected by law and everything else over 65 is protected by nature ...