Tools / Size tiers

Build-a-box size tiers

Model 6 / 9 / 12 box discounts as percent off or fixed per unit for Build your own. Results stay in your browser; install RRR Bundles when you are ready to publish checkout-safe offers.

Calculate

How it works

This tool focuses on build-a-box size tiers decisions merchants make before installing a bundling app. Inputs stay in your browser; nothing is uploaded.

When you are ready to go live, create the matching offer in RRR Bundles so pricing applies through Shopify Functions rather than fragile theme scripts. Plan limits use attributed bundle revenue, not whole-store GMV.

Open the Build your own creation demo for field-by-field setup after you trust the numbers.

Merchants searching for guidance on build-a-box size tiers usually need both a number and a next step. This page supplies the number; RRR supplies Functions-backed execution, theme embeds without code edits, and analytics on attributed bundle revenue.

Use conservative inputs. It is better to under-promise in a calculator and over-deliver in Analytics than the reverse.

How to read your result

Treat green results as permission to prototype, not a guarantee. Re-run with pessimistic attach rates and higher discount costs. If the story only works with heroic assumptions, change the offer design.

After install, compare estimates to Analytics attributed revenue and AOV with vs without bundles.

Share screenshots of the result panel with your team. Align on the offer type badge before anyone edits the live theme.

When to use this vs other tools

Confirm the box can complete with BYOB feasibility before publishing size discounts.

Related tools: BYOB feasibility Volume breaks.

Worked example

A mid-size DTC brand runs this planner during a Friday pricing review, captures the recommended configuration, then builds the offer as a draft in RRR Bundles over the weekend. They enable Functions Monday morning and watch attributed revenue for two weeks before increasing discount depth.

For strategy depth, read the companion article once published: /blog/shopify-build-a-box-size-tiers.

After the worked pass, open this calculator again with last month's real sessions or costs so the model matches your store.

Going deeper on size tiers

This section expands the size tiers workflow for Shopify merchants who need search-friendly, practical detail beyond the calculator card.

Implementation notes in RRR Bundles

Create the offer Disabled, preview on a draft theme, then Enable and wait for the live sync badge. Activate discount, cart transform, and validation Functions in Settings. Theme widgets are embeds and blocks — the app does not write into your theme files.

After launch, compare this page’s estimate to Analytics: attributed revenue, AOV with vs without bundles, and funnel views → ATC → orders. If results lag the model, adjust attach assumptions before deepening discounts.

SEO and merchandising tips

Dedicated kit pages (Fixed / Builder) can rank for gift queries; FBT and Cross-sells enrich existing PDPs. Keep offer titles clear, translate widget strings for Markets you sell into, and schedule Active dates for campaigns instead of remembering to toggle offers manually.

Prefer attributed-revenue plan caps so a strong non-bundle week does not force an upgrade. New eligible RRR charges include a 14-day free trial so you can validate Functions pricing before the first invoice.

When to get a second opinion

If two calculators disagree — for example AOV lift looks huge but BOGO margin is thin — trust the margin tool. Revenue without profit is not a growth plan. Use decision quizzes when the offer shape is unclear, then return to builders for numbers.

Trust, compliance, and next clicks

These planners never ask for your myshopify domain and never require install to compute a result. When you choose to continue, installation starts on the Shopify App Store — the supported path for App Store requirement 2.3.1.

Read the privacy policy for what RRR stores after install, and the FAQ for Functions, caps, and theme embeds. For a narrative walkthrough of the same ideas, publish the companion article linked in Related resources from the Ops blog CMS.

If you manage multiple stores, export bundle JSON after the first win and reuse the definition. Agencies can standardize on Multipack or FBT templates per vertical using the same economics you just modeled.

Bookmark this page for quarterly pricing reviews. Re-running the same inputs after a catalog change often reveals that yesterday’s “safe” discount no longer clears your floor — especially when suppliers raise unit costs mid-season.

FAQ

Percent off or per-unit?

Percent is easy to explain; fixed per-unit can protect margin on large boxes. Model both here before building in RRR.

Which tier should be Most popular?

Usually the middle tier (for example 9 of 6/9/12) — highlight it in the builder UI.