donnamb 

I agree with Tom about the "butt-o-meter". You need to know your sitbone span before you make choices about your saddle. However, he's a little off with the saddle types. The B-33 just has more/stronger springs than the B-66/67 saddle and is a little bit wider. Traditionally, the B-33 is popular in underdeveloped countries with terrible roads. The B-66 and the B-67 are the same saddle. The B-66 is for straight pipe style seatposts and the B-67 is for the newer, "microadjust" seatposts. There are 2 variations of these that are considered "women's" models - the B-66S and the B-67S. The noses are shorter. The "S" stands for short. Traditionally, that was because women wore skirts and dresses to ride, but some women (and even a few men) just find it more comfortable. Other people can't stand them. I have the B-67 regular and I'm perfectly happy with it. There's really no way to know which kind you'll like until you try them.

First thing is to get your sitbone measurement. It has nothing to do with how wide one's rear end is. You can gain or lose weight and that will remain the same, although childbirth can widen it a bit in some women. The average woman's span is between 5 and 6-ish inches. My span is 7 inches, so I went with the B-67. I would also recommend you get your Brooks through Wallingford. Bill has helped so many women choose the right saddle for them. If he knows your sitbone span and something about how and what you ride, he'll suggest one or more models for you. The best part is if you buy from him, you have 6 months to try it out and still be able to exchange it. No one else does that. I've heard of women who have gone through 4-5 saddles before they found the perfect one for them.

If your pain is especially centered in your soft tissue "bits", a Brooks may well work for you.