Best Size Chart Apps for Shopify Compared

The best size chart app for Shopify is the one that turns your existing size guide into clear, mobile-friendly charts with the least manual work. Kiwi Size Chart & Recommender is the most established chart-first option we could check, Virtusize and Sizebay offer charts inside larger fit products, and ZeDaq.ai uses your chart to power a photo size scan rather than a pop-up.

ZeDaq.ai publishes this blog. Competitor details come only from each company's own public page or Shopify App Store listing, checked November 2026. For a wider look at fit and try-on apps, see our roundup of try-on apps for Shopify.

What should a Shopify size chart app do?

A size chart app shows shoppers your size guide on the product page. It sounds simple, but the details decide whether shoppers use it.

Look for these basics:

• Fast setup. Importing an existing chart beats typing every cell.
• Rules that apply charts automatically. Linking charts to collections or product types saves time on every new product.
• Unit switching. Shoppers in the US expect inches, while many others expect centimeters.
• A clean mobile layout. Wide tables need to scroll or stack on a phone.
• Room for fit notes. A line like "runs small, size up" often matters more than the numbers.

Which size chart apps can you use on Shopify?

Kiwi Size Chart & Recommender

Kiwi's Shopify App Store listing (checked November 2026) shows the app by Staytuned with a 4.7 rating from 1,242 reviews. It is the clearest chart-first app we could verify.

The listing names these features:

• "Import unlimited size charts from images, product descriptions, or CSV"
• "Add multiple size tables, images, videos, tabs, and more to your size charts"
• "Create product or collection-based size guides that auto-apply to new products"
• "Automatically update the sizing unit based on your customer's location"
• AI-powered size recommendations

Plans on the listing are Free, Premium at $7.99/month, Plus at $14.99/month and Ultimate at $26.99/month. Paid plans include a 14-day free trial, and the listing says extra charges may apply based on order volume on Plus and Ultimate.

Virtusize Table

Virtusize lists "Virtusize Table" on its homepage (checked November 2026), described as "Visual size charts that build shopper confidence." The same page says you can upload size data as CSV, Excel or PDF, and its AI converts it to a standard format.

The homepage names Shopify among its platforms and shows Shopify pricing "from $39/mo" after a $1 first month. Its Shopify App Store page said the app wasn't currently available there when we checked, so ask Virtusize how Shopify setup works now.

Sizebay Size Charts

Sizebay's homepage (checked November 2026) lists Size Charts as part of its Size & Fit product. It says you can "Display individual product size charts that are managed automatically and effortlessly."

The homepage doesn't show prices or name Shopify specifically. Our ZeDaq.ai vs Sizebay comparison covers how the two handle sizing.

ZeDaq.ai: charts that drive a size scan

ZeDaq.ai works differently from a pop-up chart app. You enter your size guide in the Shopify app, one chart per garment type: tops, outerwear, dresses and bottoms. The chart then powers "Find my size," a 30-second body scan from one photo plus height.

Instead of reading a table, the shopper gets one label from your chart, such as "M" or "UK 12." If they fall between sizes, the scan sizes up to the largest relevant measurement. With no chart added, it falls back to a generic UK, US, EU or AU chart.

ESC Size Charts

ESC Size Charts is often compared with Kiwi. We couldn't load its Shopify App Store listing when we checked in November 2026, so we haven't stated its features or prices here. Check its listing directly before you decide.

How do the size chart apps compare?

Competitor details come from each linked page, checked November 2026.

App	Chart import	Auto-apply rules	Recommends a size	Listed price
Kiwi	Images, product descriptions, CSV	Product or collection based	Yes, AI-powered	Free to $26.99/mo
Virtusize Table	CSV, Excel or PDF	Not detailed on homepage	Yes, in Virtusize	From $39/mo after $1 first month
Sizebay	Not detailed on homepage	"Managed automatically"	Yes, in Size & Fit	Not shown
ZeDaq.ai	Entered per garment type	One chart per garment type	Yes, from a photo scan	Free to $299/mo

Is a size chart enough on its own?

Often it isn't. A chart asks the shopper to measure themselves, find a tape, and read a table correctly. Many shoppers skip that and guess.

A chart is enough when:

• Your sizes are simple. One-size items or S, M, L basics rarely need more.
• Shoppers already know your brand. Repeat buyers often know their size.

You may want a size recommendation on top when:

• Fit questions come up often. Customer service hears "which size?" every day.
• Your cuts vary. A slim shirt and a relaxed shirt need different advice.
• Shoppers are new. First-time buyers have no past size to go on.

Our guide to size recommendation apps for Shopify covers tools that pick a size for the shopper.

How do you build a chart that works in any app?

Every app depends on the chart you give it. Spend an hour on the chart before you compare apps.

1. Use body measurements, not garment measurements. List the chest, waist and hip of the person who fits each size, not the flat width of the item.
2. Make ranges meet. If M ends at 38 inches and L starts at 39, a shopper at 38.5 falls in a gap.
3. Split by garment type. Tops need chest. Bottoms need waist and hip. Dresses need all three.
4. Pick one unit, then convert carefully. Round consistently and check a few conversions by hand.
5. Add a fit note per product. Say whether the item runs small, large or true to size.

Example tops chart

This is an example chart for illustration only. Check your brand's own chart before using any ranges.

Size	Chest (in)	Chest (cm)
S	34–36	86–91
M	37–39	94–99
L	40–42	102–107
XL	43–45	109–114

Notice the gap between 36 and 37 inches. A shopper at 36.5 inches has no size. Closing that gap to 34–36.5 and 36.5–39 fixes it.

If you plan to use your chart for try-on sizing too, read our guide on matching your chart in a try-on app for the fields that matter.

How should a size chart look on a phone?

Most shoppers will see your chart on a small screen. A table that looks fine on a laptop can become unreadable on a phone.

Check these points on your own phone after you install any app:

• The link is easy to find. Place "Size guide" next to the size selector, not at the bottom of the description.
• The chart opens without leaving the page. A pop-up or drawer keeps the shopper close to the add-to-cart button.
• Columns fit or scroll sideways. If a table has more than four columns, see whether the app lets shoppers swipe across it.
• Text is large enough. Numbers should be readable without zooming.
• Units are clear. Label every column with "in" or "cm" so nobody has to guess.
• How-to-measure help is close by. A short diagram or two lines of text on where to measure chest, waist and hip saves confusion.

Then ask someone outside your team to find their size using only the chart. Watch where they hesitate. One small change, such as moving the link or adding a fit note, often fixes the biggest problem.

What does ZeDaq.ai cost?

ZeDaq.ai lists its plans on the pricing page:

Plan	Price	Notes
Free	$0	3 try-ons, 3 measurements and 5 invoices a month
Micro	$14/mo
Starter	$49/mo
Growth	$129/mo
Scale	$299/mo

Every paid plan has a 3-day free trial with no card required.

FAQs

Is there a free size chart app for Shopify?

Kiwi's listing shows a Free plan. ZeDaq.ai also has a Free plan, which uses your chart for 3 size scans a month.

Can I import my existing size chart?

Kiwi's listing says it imports charts from images, product descriptions or CSV. Virtusize's homepage says it accepts CSV, Excel or PDF.

Should I use inches or centimeters?

Use the unit your main market expects, and offer the other if the app supports it. Kiwi's listing says it can switch units based on the shopper's location.

How many size charts does a store need?

Usually one per garment type, not one per product. Tops, outerwear, dresses and bottoms fit differently, so each needs its own ranges. Add a separate chart only when a product's cut differs clearly from the rest.

Should I list garment measurements or body measurements?

For sizing, list body measurements: the chest, waist and hip of the person who fits each size. You can add garment measurements in a second table if shoppers ask how an item lies flat.

Does ZeDaq.ai show a size chart pop-up?

ZeDaq.ai uses your chart to recommend one size after a photo scan. It's a size answer rather than a table the shopper reads.