Low Waist Measurement?

I'm on the Urban Outfitters website (their catalog is one of my favorite sources of thinspo), and the size chart has a measurement for your low waist (in addition to natural waistline, of course).  Where would you take this measurement?    I measured the area where most of my jeans sit, but it gives me a completely different size than the size that is associated with my natural waistline measurement.  My natural waist is 24.75" and my supposed "low waist" is 31.75".  According to their size charts I am x-small/0 (using natural waist) and medium/6 (using low waist).  It's just super frustrating.  I've always had trouble with the fitting of my pants since my ass is disproportionate to the rest of my body (when I was 115 lbs, I think it was only 1 inch, if that, smaller than Kim Kardashian's...her's is 38" or 39" I believe?).  I actually don't mind its size since most guys seem to like it, especially my boyfriend =).

Anyways, I always buy pants in-store, never online, but I was just curious since the available items vary between in-store and online.  

umm..huh..WTF

Bush. Palin. Double-Quarter Pounders.  American Cheese.  Walmart.  Larry the Cable Guy.  AND NOW THIS WOMAN:
http://www.sfgate.com/cgi-bin/blogs/sfmoms/detail?entry_id=59144
...one more reason to pretend I'm Canadian!

It's about a woman who's goal is to become the fattest woman in the world.  I am speechless.

Edit: If someone can find the website where men apparently pay to watch her eat, let me know!  I am so disgusted, but I still want to see what that site looks like.  I think it would be good reverse thinspo.

Oh, and another thought...I was so distracted by the vomit-inducing content of the article, that I overlooked something that is waaaay sad about this:  how can she be so selfish?!  There are people in our own country that are STARVING...it would be so easy to help out the less fortunate with the kind of money she is raking in from stuffing herself.  It's not that hard to donate to a food bank/soup kitchen.

It's one thing that we choose not to eat, but it would really suck to not be able to afford food...and here comes this lady that spends $750/week on food!!!!  That is like the amount I spend on food for 3 -4 months I think!!! Fuck man, I'm angry.

My Thinspiration...

Several months ago (maybe even a year ago?) I had a post of pics with this chick in it.  Her name is Vikki Blows (yes, her real name!) and she is a glamour model from the UK.  I envy pretty much everything about her: her body, her style, her hair, and the list goes on.  Anyways, just thought I would share some pics more recent than the last ones I posted (obviously).  If you like them, click HERE to see an archive of Vikki Blows posts from EGOTASTIC.  Enjoy!