Quantity settings control how priced option values are added to the cart. Whether an add-on should be purchased once or match the main product quantity, these settings ensure correct pricing and fulfillment.
Quantity Behaviors
Choose how the option quantity relates to the main product:
Add once only - The option is added once regardless of product quantity. Customer buys 3 shirts with gift wrapping? Gift wrapping is charged once.
Match main product quantity - The option quantity matches the product. Customer buys 3 shirts with monogramming? Monogramming is charged 3 times.
Fixed custom quantity - Always add a specific quantity. Useful for options that come in sets (e.g., always add 4 buttons).
Let customer choose quantity - Customer enters their desired quantity. Good for add-on products where customers might want multiples.
Configuring Quantity
Edit an option
Scroll to Quantity Settings
Select the desired behavior from the dropdown
For fixed quantity, enter the number
Save the option
Note: Quantity features require the Growth plan or higher.
When to Use Each Setting
Add once only - Gift wrapping, rush shipping, setup fees, one-time services
Match main product - Per-item customization like engraving, monograms, protective coatings
Fixed quantity - Bundled add-ons, sets, or packages
Customer choice - Additional items customers might want in varying quantities
Show Quantity for Zero Price
When using “Let customer choose quantity,” you can control whether the quantity field appears for zero-price options:
Enable Show Quantity for Zero Price Options
Customers see the quantity field even when no additional charge applies
This is useful when quantity information is needed for fulfillment even without pricing.