I checked that site and the only Assos that is priced at $76 are Assos Men's S-Series Cycling Shorts, everything else is $154-200+, normal pricing.
I'm 6'2" 200 and have Assos F.I. Mille in XL, my Pearl Izumi Ultrasensor's are L and my Santini Fluid Twist Gel are XL... for comparison. I also have Performance Ultra's in L. They are all bib shorts.