Best size chart apps for Shopify in 2027: free and paid, compared

Size charts look like a small detail until you read your returns log. In a Coresight Research report published in May 2026, nearly 70% of shoppers who had returned clothing bought online said the reason was size or fit, according to Alvanon's summary of the findings. The same report estimates the US online apparel return rate at 23.4% in 2025.

A Shopify size chart app will not fix a garment that runs small. It does make your measurements easy to find, readable on a phone and clear about which size system they use. This guide starts with what you can do without an app, then compares six apps on what they actually charge, and ends with a checklist for installing one in 2027.

Option 1: a size chart without an app

Shopify has an official way to add a size chart pop-up with no app. Its pop-up tutorial uses size charts as the example:

1. In Settings, Metafields and metaobjects, Products, add a definition called "Size chart" with the type Page.
2. In Online Store, Pages, create a page with your size table and make it visible.
3. In the theme editor, add a Pop-up block to the product information section and connect its page to the metafield through the dynamic source icon.
4. On each product, pick the right size chart page in the metafield.

Horizon also lists "Size chart" among its merchandising features on the Shopify Theme Store, and Dawn has the same Pop-up block in its product information section.

The limits are in Shopify's own text. The tutorial "requires a theme that supports dynamic sources", "you can link only one page in the product metafield", and if a product has no page assigned, "the pop-up is blank". You also assign charts one product at a time, and every shopper sees the same table in the same units.

When this is enough: one or two charts, one market, a catalogue you update rarely. When an app is worth it: several product types, shoppers in more than one country, new products every week, or you want how-to-measure instructions and inch/centimetre switching without writing code. Either way, the table itself has to be right first. Our guide on how to make a size chart covers measuring, grading and a free Excel template.

The six apps at a glance

"Admin languages" is the language list on each listing, meaning the app's own interface. Translating the chart your shoppers see is a separate feature, covered below.

The apps one by one

Kiwi Size Chart & Recommender

Kiwi has been on the App Store since 2018 and has the most reviews in this group. Its real strength is the size recommender. On Plus you get up to 10 custom recommenders with performance analytics, and Ultimate makes them unlimited and auto-translates charts and recommenders into 22 languages. The free plan includes 22 templates and unlimited CSV uploads.

The downside is that the bill grows with your store. Kiwi's pricing page adds a usage fee on Plus and Ultimate, calculated "based on the number of orders processed in the last 30 days". On Ultimate it goes from $10 (100 to 500 orders) to $120 (2,000 to 6,000 orders) and $700 above 20,000 orders. The first billing month has no usage charge. A few recent reviews on the listing complain about unexpected charges or the new pricing, including one after a plan change to order-based pricing, and the developer replied to them.

MP Size Chart & Size Guide (formerly Avada)

MP is now run by Shopplaza, carries the Built for Shopify badge and has a 5.0 rating from 875 reviews. On price it is hard to beat. Unlimited charts cost $12.95 a month, and the free plan already includes AI size recommendations, 30+ templates, unit conversion and a size guide page. Paid plans cap AI recommendations (800 on Growth, 2,000 on Pro, 5,000 on Advanced), so check that number if you plan to lean on the recommender.

CSC Size Chart & Size Guide (Clean Size Charts, by TaskHusky)

CSC is the cheapest way to unlimited charts among the well-reviewed apps, at $6.99 a month on Grow, which also includes showing the chart by country, import/export and unit conversion. The listing offers done-for-you setup and free migration of your charts if you switch from another app. AI recommendations start on Advanced ($14.99, 500 included). Plus has unlimited recommendations but is "priced by monthly orders", from $29.99 up to 250 orders to $299.99 above 5,000.

ESC Size Charts (Eastside Co)

ESC is the lowest price here, $4.99 for unlimited charts, with assignment by tag, collection, product, vendor or type, and app blocks for Online Store 2.0. Read the recent reviews before you install, though. The listing shows 3.3 out of 5, and reviews posted between June and October 2026 describe problems. One from 7 October 2026 says the app "has not been working properly for the past few MONTHS, no response from the support". Another from 6 August 2026 reads: "Was working perfectly but stopped working - have emailed support with no response". We found no developer replies to those reviews.

Smart Size Chart & Size Guide (SmartSize)

SmartSize is newer (2022), has Built for Shopify status and a 4.9 rating. Its free plan has no watermark and can build a chart from an image with AI. Unlimited charts cost $12 a month, and $19 adds an AI "Find my size" fit quiz for men, women, kids and pets. The listing describes Pro 100 as "100 users/month - Unlimited fit quiz", so ask the developer what happens above 100 users.

Plainfee Size Charts (ours, and new)

Plainfee Size ChartsSize charts that show every shopper their own country's sizes, with how-to-measure steps in 31 languages.See how it works

We built Plainfee, so weigh this paragraph accordingly. It is new on the Shopify App Store (since 23 October 2026) and has no reviews yet. The free plan has 3 live charts without a watermark, and Pro is a flat $14.99 a month ($149 a year) with unlimited charts and no fees per order. Each shopper sees their own country's sizes first (44 countries), in inches in the US and centimetres elsewhere, with how-to-measure drawings and steps in 31 languages. Charts are saved in your store as Shopify metaobjects, so they stay if you uninstall. It does not have a fit recommender or analytics, so if those matter to you, Kiwi, MP, CSC or SmartSize is a better fit.

What 25 charts and 3,000 orders a month cost

A mid-sized clothing store with 25 charts (tops, bottoms, dresses, shoes, kids, accessories, a few brand-specific tables) and 3,000 orders a month needs unlimited charts on every app here.

Kiwi's annual billing lowers its Ultimate total to $141.59 a month at this volume. If you are on Kiwi and want to compare like for like, our guide to moving from Kiwi Size Chart covers exporting your tables, images and product assignments.

What to check before installing in 2027

Price is easy to compare, but these checks decide whether you will still be happy with the app in a year.

• Order-volume fees. Read every plan's small print for "based on order volume" or "priced by monthly orders". A busy November can move you up a tier.
• Theme app extension, not script tags. Shopify will stop injecting script tags into storefronts on 1 March 2027. After installing, open the theme editor. The chart should appear as an app block or app embed you can see and remove. Our Shopify deprecations guide shows how to check your other apps too.
• Where charts live when you uninstall. Ask whether your tables stay in your store (pages, metafields, metaobjects) or only in the app's database, and whether you can export them first.
• Sizes per shopper country. In women's clothing, a US 8 is a UK 12 and an EU 40. If you sell abroad, check the app can show each visitor their own system, or at least several columns. Our clothing size conversion chart has the tables to start from.
• Units by location. Inches for US shoppers, centimetres for nearly everyone else, with a switch.
• Accessibility of the pop-up. Open it with the keyboard only, close it with Escape, and confirm the chart is an HTML table, not an image. The European Accessibility Act covers e-commerce services provided to consumers after 28 June 2025; microenterprises providing services (fewer than 10 people and up to EUR 2 million turnover or balance sheet) are exempt. See our summary of EU rules for fashion stores. This is general information, not legal advice.
• Translations. Check which languages the shopper-facing chart supports on your plan, not only the admin. Kiwi, for example, locks auto-translation to paid plans.
• Recent reviews and replies. Sort reviews by newest. Unanswered complaints from the last three months tell you more than the overall rating.

Structured, readable size data is also what AI shopping assistants look for when they compare products. Our guide on product data for AI shopping agents goes into that.

Which one should you pick?

• You need a fit recommender and analytics: Kiwi is the most established, MP is the cheapest way in, SmartSize has a quiz-style finder at $19.
• You only need clear charts, lowest price: CSC Grow at $6.99 for unlimited charts, with country display included.
• You sell to many countries and want flat pricing: CSC Grow, MP Pro or Plainfee Pro, depending on whether you value recommendations (MP), the lowest price (CSC), or each shopper's own size system and measuring steps in 31 languages (Plainfee).
• One market, one chart: skip the app and use Shopify's Pop-up block.

If you keep your measurements in a spreadsheet, whichever app you choose, start there. Our guide to making a size chart from Excel or Google Sheets shows how to keep the table clean when you paste it in.

Frequently asked questions