I’ve had a couple of reader requests recently about help for fitting pants over their flat bottoms. I too have this as an issue, and find that the extra fabric that my butt doesn’t fill out just pools unattractively underneath my bottom.
One thing I’ve taken to doing more so that this is not an issue is wearing skirts and dresses most of the time. I’ve found with jeans that there needs to be good stretch in the denim so that they fit snugly and don’t sag and bag (for me Jag and Country Road jeans fit well).
Having done some research on the ‘net, I’ve found that it is a problem that is difficult to alter completely out of an existing pant, but can be something that a pattern is altered for when making a pair of trousers.
There needs to be less room in the seat, and so as the pattern is cut, alterations are made to the pattern to remove some of the excess fabric at the cutting stage.
If you are a sewer, then I’m sure that you’ll find lots of help and discussions here http://sewing.patternreview.com/cgi-bin/sewingclasses/board.pl?t=29657 http://artisanssquare.com/sg/index.php/topic,2106.35.html. and I also found this http://youlookfab.com/welookfab/topic/old-flat-fannie-here
I also found this for altering an existing pair of pants http://artisanssquare.com/sg/index.php?topic=4380.msg69664
The reality is that women’s bodies are complicated and so there is no one size fits all approach, and this is why as many women are different shapes and sizes through the waist, hips, buttocks, thighs area that pants can be so difficult to buy off the rack.
If any of you lovely sewers would like to put in you 2c worth I’d love for you to comment.