A mix and match bundle gives the shopper choice inside a frame you control. They pick which items; you decide which items are eligible and what the set costs. It converts better than a fixed bundle because nobody has to accept a product they did not want, and it costs less than a sitewide discount because the eligible set is yours to design.
Define the eligible set. A collection, a tag, or a product list. Only these items count toward the bundle.
Set the quantity and the price. Any 3 for $45, or any 3 at 20% off. Fixed price reads as stronger; percentage is easier to keep profitable across a varied set.
The shopper assembles it. They add whichever eligible items they want. The cart recognises the combination and prices it as a bundle.
Partial carts get prompted. Two of three selected shows what one more unlocks, which is the message that completes the bundle.
"Any 3 for $45" and "any 3 for 20% off" look similar and behave very differently.
Fixed price is the stronger offer psychologically, because the shopper gets a single number to evaluate and the saving on expensive items is dramatic. It is also the riskier one: if your eligible set spans $12 to $30 items, a shopper will rationally pick three $30 items and you will have sold $90 of goods for $45. Fixed pricing requires a tight price band.
Percentage off scales with what the shopper chose, so the discount is proportionate across a varied set and your margin percentage stays constant. It converts slightly less well on the same products, and it buys you the freedom to include a much wider eligible set.
The rule of thumb: fixed price when your items are within about 20% of each other on price, percentage off otherwise.
The eligible set is the whole offer. Pick it with three goals at once — move the inventory you want to move, keep the price band narrow enough for your pricing model, and make sure any three items from it make sense together in one order.
Three adjacent mechanics, each with a distinct job. A fixed bundle is a curated set at one price — strongest for gifting and for products that genuinely work as a system, weakest when the shopper wants two of the three items. Mix and match is the same price logic with the selection handed to the shopper, which removes the mismatch at the cost of some curation value.
Build your own bundle goes further: structured slots the shopper fills, usually with a step-by-step flow, which suits boxes and gift sets where the number of components is part of the product. Mix and match is lighter and lives in the normal browse-and-add flow, so it is the right default unless assembling the bundle is itself the experience you want to sell.
For the version where the extra item is free rather than discounted, see cheapest item free.
The most valuable moment in a mix and match offer is a cart with two of three items. The shopper has already committed to the mechanic and is one add away from the price they came for. A clear prompt at that moment — what the third item unlocks, in money — converts a meaningful share of those carts.
Make the prompt specific and make it reversible. "Add 1 more eligible item to pay $45 instead of $58" states the saving as a number, and a shopper who removes an item should be told the bundle price no longer applies before they reach checkout rather than after. A progress indicator works well here, counting items rather than dollars.
Not as a shopper-assembled offer. Shopify's native bundles are fixed component sets, and its automatic discounts can apply a percentage at a minimum quantity but cannot price an arbitrary shopper-chosen combination as a set. An app handles the selection and the cart-side pricing.
Fixed price when your eligible items are within roughly 20% of each other on price — it is the stronger offer. Percentage off when the set is more varied, because it keeps your margin percentage constant whatever the shopper picks.
Eight to fifteen. Fewer and it reads as a fixed bundle; many more and choosing becomes work, which lowers the share of shoppers who finish the bundle.
Under fixed pricing, nothing — which is why the price band inside the eligible set has to be narrow. If you want a wide set, use percentage-off pricing so the discount scales with what they chose.
The bundle price does not apply, and the cart should say so while offering the specific saving one more item unlocks. That partial-cart prompt is where most of the mechanic's incremental revenue comes from.
Mix and match lives in the normal browse-and-add flow with no fixed structure. Build your own bundle uses defined slots and a guided assembly flow, which suits boxes and gift sets where the components are part of the product.
Yes. Every NUO AI feature is included at $0 — no paid tier, no order cap, no revenue share.
