This document provides instructions for retailers on how to onboard and install Sizey's size recommendation service. It outlines a 3 step process: 1) Register for a Sizey Hub account and select a subscription plan, 2) Install the Sizey recommendation app or plugin depending on if the retailer uses Shopify or Woocommerce, and 3) Complete setup by providing the API key to connect the app to Sizey's services. Once installed, the size recommendation button is automatically added to products with size charts.