Abstract: One or more aspects of the present disclosure are directed to systems and methods for a mobile-based and a web-based fit and product recommendation and discovery. In one aspect, a method includes receiving a plurality of parameters, via a graphical user-interface, the plurality of parameters providing individual-specific measurements pertaining to an article; performing a plurality of numerical analyses using the plurality of parameters; and determining at least one fit recommendation for the user based on the plurality of numerical analyses; determining one or more product recommendations for the user based on the at least one fit recommendation; and outputting the at least one fit recommendation and the one or more product recommendations to the graphical user-interface.