Size charts and fit

Kiwi Size Chart & Recommender

By Staytuned

A size-chart and fit-recommendation app for apparel and other products where dimensions materially affect purchase confidence and returns.

The verdict

Is Kiwi Size Chart & Recommender right for you?

Choose it if...

  • Sizing questions or fit-related returns are material
  • Products need different charts by type, brand or market
  • You can supply accurate measurements and maintain them

Look elsewhere if...

  • One clear theme table already solves the need
  • Product measurements are missing or unreliable
  • You cannot monitor recommendation quality and fit-related returns
StackFit’s view

Its core job is helping customers choose the right product size using charts, measurements and fit recommendations.

See the full product summary

Kiwi Size Chart & Recommender is a Shopify app for helping customers choose the right product size using charts, measurements and fit recommendations. This guide separates the useful day-to-day job from the wider feature list so you can judge the operational fit before installing it.

What you get

The main outcomes to expect.

Focus on the capabilities that solve a real customer or operational problem.

  • Product and collection size charts
  • Fit and size recommendations
  • Unit conversion and market-specific display
  • Reusable chart and product rules
Setup effortModerate setup
Best ownerEcommerce merchandising or product lead
Connections4 recorded
See connections and integrations
  • Shopify product pages
  • Theme app blocks
  • Shopify Markets
  • Product metafields

Getting started

A practical route to launch.

Scan the stages first. Open only the instructions you need while completing the work.

Before you startHave these essentials ready
  • A measured baseline for fit-related return rate
  • A named owner for setup, testing and ongoing review
  • A documented rollback route if the customer journey breaks
  1. 01
    PlanDefine the first job
  2. 02
    InstallConfigure the smallest useful version
  3. 03
    ConfigureCheck the connected journey
  4. 04
    ConfigureRun realistic tests
  5. 05
    TestMeasure before expanding

Detailed walkthrough

01PlanDefine the first job

Write down the exact problem Kiwi Size Chart & Recommender should solve, the customers or products in scope and the current fit-related return rate.

What you should have
A one-page launch brief with a dated baseline
How to check it
Confirm a one-page launch brief with a dated baseline before continuing.
Open the official instructions
02InstallConfigure the smallest useful version

Audit product measurements, build one chart for a high-return product group and add a recommendation questionnaire only when the data supports it.

What you should have
One controlled workflow with clear eligibility and exclusions
How to check it
Confirm one controlled workflow with clear eligibility and exclusions before continuing.
Open the official instructions
03ConfigureCheck the connected journey

Review the storefront, Shopify admin, notifications, reports and any connected platforms. Remove duplicate features before publishing.

What you should have
A completed dependency and ownership check
How to check it
Confirm a completed dependency and ownership check before continuing.
Open the official instructions
04ConfigureRun realistic tests

Check chart assignment, units, mobile readability, localisation, missing data and representative recommendation results with real product measurements.

What you should have
Passed mobile, desktop and admin-side test evidence
How to check it
Confirm passed mobile, desktop and admin-side test evidence before continuing.
Open the official instructions
05TestMeasure before expanding

Run the controlled setup long enough to compare fit-related return rate and size-guide engagement rate with the saved baseline. Expand only when the evidence supports it.

What you should have
A keep, change or remove decision with an owner and review date
How to check it
Complete the journey on mobile and desktop, then confirm the intended event appears in the app reporting.
Open the official instructions
See the full planning checklist
  • The single customer or operational problem to solve first
  • Which products, markets and customer groups are included
  • What result would justify keeping the app after the trial
  • Which existing app or Shopify feature owns any overlapping job

Using it well

A simple operating rhythm.

You do not need to inspect everything every day. Use this schedule to focus on the right checks.

Every week

Review feedback and exceptions

A weekly check catches poor customer experiences before they become normal.

What to do and track
What to do

Review fit-related return rate and size-guide engagement rate plus failed or excluded journeys.

Useful output

Weekly fit-related return rate trend and open exceptions

Read the official guidance
Every month

Check commercial value

Attributed activity is only useful when the net outcome improves.

What to do and track
What to do

Compare the commercial or operational benefit with app cost, discounts and team time.

Useful output

A documented net-value decision

Read the official guidance
After major changes

Re-test anything affected

Connected app behaviour can change when another part of the stack changes.

What to do and track
What to do

Repeat the test journey after theme, checkout, catalogue, consent or integration changes.

Useful output

A passed regression check

Read the official guidance

Success check

How to know it is working

  • Fit-related return rate
  • Size-guide engagement rate
  • Product conversion rate
  • Recommendation completion rate

Cost and cautions

Know the commitment before you choose.

Starting price
Free plan available
Typical range
USD 6.99-24.49/month
Pricing model
Feature and usage tiers

Confirm chart, recommender, impression and advanced-rule allowances for the catalogue.

Check current pricing before purchasing. Snapshot checked 21 August 2026.

01

Installing Kiwi Size Chart & Recommender without recording a baseline for fit-related return rate.

02

Switching on every available feature before the core journey has been tested.

03

Treating app-reported revenue or activity as incremental without a controlled comparison.

See 3 more technical and commercial considerations
  • A recommendation cannot correct inaccurate product measurements.
  • Extra questions can add friction if the model does not improve confidence.
  • Fit performance should be checked by product and market.

Questions and evidence

Answers without the research overload.

Is Kiwi Size Chart & Recommender the right choice for every Shopify store?

No. It is strongest when sizing questions or fit-related returns are material. Stores that one clear theme table already solves the need should compare the alternatives before installing.

How should I test Kiwi Size Chart & Recommender?

Record the relevant baseline, launch the smallest useful configuration, check the complete customer journey and compare the agreed metric after enough traffic or orders have accumulated.

Does the affiliate relationship affect this guide?

No. StackFit may earn a commission from the app link, but commercial relationships never affect quiz scoring, rankings or the editorial verdict.

How much work does Kiwi Size Chart & Recommender take to set up?

Moderate setup is the current planning guide. Before installing it, confirm a measured baseline for fit-related return rate, a named owner for setup, testing and ongoing review, a documented rollback route if the customer journey breaks, then test the complete customer and operational journey.

What should I measure after launching Kiwi Size Chart & Recommender?

Start with fit-related return rate, size-guide engagement rate, product conversion rate. Compare those measures with the pre-launch baseline and include app cost and operating time.

Ready to move?

Choose the route that matches your confidence.

Still unsure

Get a store-specific answer

See what to install now, add later, replace and avoid for the moment.

Start the free assessment
The app link is commercial and may earn StackFit a commission. Commission never affects recommendations.