This search and filter app https://apps.shopify.com/ultimate-search-and-filter-1 let your users search by a combination of Gallon, Quart, Dimensions, Etc. Suppose those fields are stored in product option or variant metafield, the Ultimate Search engine easily identifies the correct product variants and present them to your end-user. Since you have some special characters in your text, i would recommend contacting the team to have them set it up for you.
Topic summary
Main issue: How to enable shoppers to filter and find products by size and dimensions (e.g., Quart, 1 Gallon, 5 Gallon; 1 Inch, 11"x17", 12 ft) without relying on many single‑item collections. Current setup uses the Smart Search & Filter app, but legacy collections like “1 Gallon” or “1 Inch” appear in filters, leading to clutter and inefficiency.
Proposed approach: Use an alternative app (Ultimate Search and Filter) that supports combined filtering by Gallon/Quart/Dimensions if those attributes are stored as product options or variant metafields. The app can identify the correct product variants and present them directly to users.
Implementation note: Because size/dimension labels may include special characters (e.g., inch symbols and quotes), the responder suggests contacting the app’s support team for proper configuration.
Status and next steps: No decision made yet; best practices not fully resolved in-thread. Suggested actions include mapping size and dimension data into product options or variant metafields and evaluating a search/filter app that can leverage those fields, with vendor assistance for edge cases involving special characters.