uShip calculates shipping rates based on several factors:

• Product Dimensions:
  • Length, width, and height
  • Imported directly from your product's title or description
  • Additional functionality for size variations with Shopify metafields. 
  • For more information, check out this article.
• Product Weight: The weight specified for each product in your Shopify admin
• Origin ZIP Code: Your store's shipping origin, set in Settings > Shipping > Shipping origin
• Destination ZIP Code: The customer's shipping address
• For sets of identical items, include "(set of X)" in the product title. Dimensions will be based on a single item, but weight should be the total for the set.