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Cart & Checkout

Should the Cart Quantity Selector Stand Out?

Making the quantity selector easier to notice may change how often shoppers adjust quantities and affect order value.

  • Cart
  • Average order value (AOV)

Control vs Variant

How hard the same message is pushed is the variable.

Changed
Emphasis
Page
Cart
Difference
changed

Hypothesis

Keep item removal, price display and other cart controls unchanged.

How to run this test

Primary metric

Average order value (AOV)

Measure revenue per completed order and read this buyer-only average alongside revenue per visitor.

Other metrics

  • Items per orderCompare the average number of items in completed orders.
  • Order completion rateTrack order completion among assigned visitors as cart value changes.
  • Revenue per visitor (RPV)Compare revenue per assigned visitor, including visitors who do not purchase.

What to check before and during the test

  • ChangeChoose one visual treatment to make the quantity selector more noticeable; keep its position and behavior fixed.
  • Keep constantKeep the selector position, remove-item control, price display and other cart actions unchanged.
  • BehaviorRead quantity changes alongside average order value.
  • InterpretationTrack removals and revenue per visitor; investigate accidental removals only with a predefined interaction signal.
  • Separate testsTest other positions or styles separately.

Setup mistakes to avoid

  1. 1Do not make quantity controls so prominent that they compete with the CTA.
  2. 2Do not change remove or favorite icons along with the quantity selector.
  3. 3Keep the remove control easy to find.
  4. 4Do not reload the full page when quantity changes.
  5. 5Make sure quantity controls do not overlap on mobile.