Application service provider featuring application programming interface (API) software for garment sizing recommendations and for use in the retail industry to allow apparel retailers to integrate size determination capabilities into AI-powered commerce agents and automated conversational shopping assistants, enabling the collection of customer body measurements and the generation of personalized fit, sizing, and body-related recommendations through agentic AI interfaces; Software as a service (SAAS) services featuring software using artificial intelligence (AI) for garment sizing recommendations and for use in the retail industry to allow apparel retailers to integrate size determination capabilities into AI-powered commerce agents and automated conversational shopping assistants, enabling the collection of customer body measurements and the generation of personalized fit, sizing, and body-related recommendations through agentic AI interfaces