Sizebay was born with the objective of solving one of the biggest problems of those who sell clothes over the internet: consumer distrust of the size and fit of the clothes. Through a technological platform, which relates the modeling of brands/manufacturers, e-commerce products and user measurements, we deliver a powerful tool for recommending sizes and analyzing clothing suitability (virtual fitting room) that makes it possible to buy clothes at internet with more confidence and assertiveness. Simple to use and super easy to integrate, Sizebay's Size and 3D Fit Advisor Platform is an innovative service that improves the user experience in the process of buying clothes in your e-commerce. From information (gender, height, weight and age), we deduce the body measurements of the user and compared with measurements of the chosen piece, suggesting the most appropriate size and allowing comparison with other trim available.