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Quantity limits set a minimum, a maximum, or both. Edit a product or variant directly, or create rules for all products, selected products or collections.

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Choose the right entry point

Also enable Cart and checkout validation on the quantity overview page.

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Product versus variant

A product-level limit combines its variants. One small and two medium shirts of the same product count as 3 units. A variant-level limit checks that variant separately. If the medium variant has a maximum of 1, two mediums are blocked even if the product has remaining allowance. In Quantity limits by product, search for a product and edit its status, minimum and maximum. Expand variants to set their own thresholds. Confirm changes have saved, then test the storefront.

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Individual versus combined

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Minimums and timing

Leave the minimum blank or set it to 0 for no minimum. Fill at least one of the minimum or maximum fields. Quantity minimums are checked at checkout so customers can add items one at a time. Maximums follow the rule’s selected timing.
A minimum is not a purchase multiple. A minimum of 6 also permits 7 units. There is no quantity-step setting in the current rule editor.

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When rules overlap

Individual quantity rules use the first matching rule in All rules. Product-level limits, variant limits, combined rules and cumulative rules have different combination behavior. Read rule priority. Try a 2-unit product cap or a 3-unit collection cap.

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Set a color or size limit

For “product maximum 3, blue maximum 1,” follow product and variant setup. For one allowance across different products, use combined rules rather than identical product-row caps.