Just curious, but many are mentioning that they had a saddle in a specific width (Avatar 143). Did you actually have the shop measure your sit-bone width? Most Specialized dealers have a little viscoelastic pad that you sit on for a moment then measure with a ruler to see which width you need. Almost all the Specialized BG saddles come in 3 widths with 143 being the middle width.

Saddles from most other manufacturers also come in various widths as well although they typically do this under a different schema than a 'size' but rather a model name.