Specialized Toupe Width

Just started riding a Specialized Toupe Team 130mm saddlke and finding it very comfy, if a little more firm than my 143 rival.
Is there any correlation between rider build and saddle width or is it specific to each individuals sit bone spacing?
Is there any correlation between rider build and saddle width or is it specific to each individuals sit bone spacing?
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My guess is that it will be very individual.
If sizing was based on asre size then there would have to be a much greater range of sizes, judging by some of the sights I see
was mainly asking as I have purchsed a 130mm and only having tried the 143 Rival (which is padded) I am comfier on the 130 (143 seems to chaff a little on inner thigh, espescially padded version).
I am 6'2 and 13st 8lb so not exactly small, so was really wondering if the size of rider should determine the width of saddle.
Thanks for your help so far
It might not be entirely incorrect to say that lighter riders need less padding. But it all matters what type of roads you ride over - there's a big difference between roads in the UK and roads in parts of Continental Europe.