Yahoo! Personals (review: yahoo personals)
Option to search for Thick, A few extra pounds, Large.
personals.yahoo.com

Match.com (review: match.com)
Option to search for A few extra pounds, Heavyset, Other.
www.match.com

BBWHarmony.com
A large worldwide community for BBW singles.
www.bbwharmony.com

BBW Personals Plus
Mingle with thousands of BBW singles.
- BBW Personals 2-Way Matching
- Send Messages Anonymously
- Post on Message Boards
- Photo Albums & Gallery
- BBW Chat & Send Smiles :)
www.bbwpersonalsplus.com

LargeFriends.com
Provides BBWs, BHMs, FAs, and FFAs a place to develop friendship, romance, or marriage with like-minded individuals.
www.largefriends.com

Large and Lovely
Meet singles of size and their admirers.
www.largeandlovely.com

Abundant Love
Global BBW dating service for BBW & BHM lovers.
www.abundantlove.com

BBW DateFinder
Big Beatiful Women and their admirers.
www.bbwdatefinder.com

Large Passions
Big Beautiful Women and Big Handsome Men.
www.largepassions.com

Living Large in Christ
Christian BBWs, BHMs and their Admirers.
www.christianbbw.com

BBW personals is an area where there are a lot of niche sites, yet you might have just as much luck at the larger sites like Yahoo Personals (review) or Match.com (review).

Generally, specialty sites do best in areas where there is no search option at the larger dating services. Yet almost every major dating service has the option to search by body type, and full-figured women are well-represented at these services. In a test search of women at Yahoo Personals, 6% were Voluptous, 6% were were Large, 17% were A Few Extra Pounds, and 15% were Thick. This means that a full 42% of women classified themselves as being larger than the "average" body type. Multiply that percentage by millions of members and you actually have a HUGE niche site within the context of the larger general site.

Note - we have added a page that shows exactly how to find BBW Yahoo Personals.

Good luck!