1. A method of ascertaining garment size of a particular garment type for a consumer, the method comprising: storing garment data in a database resident on a web-enabled computer server, wherein the garment data is associated with a plurality of garments and for each of the plurality of garments includes a brand name, a retailer that sells the brand name, a store size, and one or more actual dimensional garment measurements which are different from the store size; receiving, by the web-enabled computer server, a designation by a consumer of a garment known to fit the consumer, wherein the designation includes a selected garment type, a selected brand name, and a selected store size; receiving, by the web-enabled computer server, a designation by the consumer of a desired garment type for purchase; determining, from the database, actual dimensional garment measurements for the garment known to fit the consumer using the selected garment type, the selected brand name, and the selected store size; identifying, by the web-enabled computer server, one or more garments in the database which correspond to the desired garment type and have actual dimensional garment measurements greater than or equal to the actual dimensional garment measurements for the garment known to fit the consumer; identifying a subset of garments, from the identified one or more garments, which have a smallest store size within each respective brand name; and transmitting for display to the consumer the subset of garments.