take a look at the shape of a nicely broken-in brooks pro, and then look at the shape of an original Specialized Romin Expert. With the exception of the cutout, its really close, which is why I think I like it so much. One other difference is that it is not suspended leather, so it won't flex in the same way, and it's not soft...and it wont conform to your anatomy. But I love them and I ride them without chamois. They come in 155mm widths, but they're flatter across the back than a brooks pro, so close to the same functional width.

gg