A size chart on Shopify reduces returns, increases purchase confidence, and directly boosts conversions for clothing, shoes, and accessories stores. Customers who aren’t sure about sizing abandon their cart — a size chart answers that question before they leave. This guide shows you exactly how to add one.
Why Size Charts Matter for Shopify Stores
Returns are the biggest cost in fashion e-commerce. Up to 30% of all online clothing purchases are returned, and the top reason is incorrect size. A clear, accurate size chart solves this at the source. Beyond reducing returns, size charts build trust — customers feel confident buying from a store that gives them the information they need rather than making them guess.
If you’ve already chosen a great theme from our guide on best Shopify themes for clothing stores, adding a size chart is the next step to maximizing conversion on your apparel products.
3 Ways to Add a Size Chart to Shopify
Method 1: Add a Size Chart Image to Product Description
The simplest approach. Upload your size chart as an image and embed it in the product description. This works for stores with a few products and straightforward sizing. The downside: it’s embedded in the product description text, which isn’t the cleanest presentation, and you have to add it manually to every product.
Method 2: Use a Shopify Size Chart App
Size chart apps create a dedicated popup or tab on your product pages. Customers click a “Size Guide” button and see the chart without leaving the page. This is the cleanest user experience and the recommended approach for most stores. Apps handle the display logic and let you assign different charts to different product categories.
Method 3: Add a Size Chart Tab via Theme Code
Edit your product template to add a tab system (Description | Size Guide | Shipping). This requires basic Liquid/HTML knowledge but gives you full design control without an app. Some premium themes like Impulse include this natively.
Best Shopify Size Chart Apps
1. Kiwi Size Chart and Recommender
Kiwi is the most popular size chart app on Shopify. It creates a size chart popup triggered by a button on product pages, includes a size recommender (customers input their measurements and get a size recommendation), and supports importing size charts from images or building them with a visual table editor. Free plan available; paid plans from $6.99/month.
2. Size Chart by Secomapp
A clean, simple size chart app that supports multiple chart templates, custom styling, and assignment of different charts to different products or collections. Has a free plan for up to 2 charts. Great for stores that just need a straightforward size chart without the recommendation engine.
3. SC Product Options (formerly Bold)
While primarily a product options app, SC Product Options lets you add a size guide as a custom option field — useful if you also need other product customization features. Best for stores that need both size charts and product personalization.
How to Add a Size Chart to Shopify: Step-by-Step
Step 1: Create Your Size Chart
Build your size chart in a spreadsheet with measurements in both inches and centimeters. Include columns for size label (XS, S, M, L, XL), chest, waist, hips, and inseam as appropriate. Export as an image (PNG) or keep it as HTML for embedding. Use actual measurements your products are made to — not generic size standards that may not match your actual garments.
Step 2: Install a Size Chart App (Recommended)
Go to the Shopify App Store and search “Kiwi Size Chart.” Click Install and complete the setup. The app will add a “Size Guide” button to your product pages automatically. In the app dashboard, click “Create Chart” to build your first size chart using the visual table editor.
Step 3: Build Your Size Chart Table
In the Kiwi app (or your chosen app), create a table with your measurements. Add a header row with measurement names. Fill in the data for each size. You can add multiple rows for different garment types (tops, bottoms, dresses). Preview how it looks on mobile — most size chart views are on mobile phones.
Step 4: Assign the Chart to Products or Collections
In the app settings, assign your size chart to specific products or entire collections. For clothing stores, create separate charts for different categories: Women’s Tops, Women’s Bottoms, Men’s Shirts, Dresses, etc. Each category likely has different measurement priorities.
Step 5: Customize the Size Guide Button
Most apps let you customize the button text and placement. Options typically include next to the size selector dropdown, below the size options, or as a floating button. Place it immediately next to the size selector — that’s where customers look when they need sizing help. Use text like “Size Guide” or “What’s my size?” — these convert better than generic “Info” buttons.
Step 6: Add Model Measurements (Optional but Effective)
Add a note at the top of your size chart: “Our model is 5’8″ (173cm) and wearing a size Medium.” This helps customers visualize fit better than measurements alone. Include a reference photo if possible.
Step 7: Test on Mobile
Open your product page on a phone. Tap the Size Guide button. Verify the popup opens cleanly, the table is readable without horizontal scrolling, and the close button is easy to tap. Mobile size chart UX is critical because most apparel shopping happens on phones.
Size Chart Best Practices
- Use your actual garment measurements — not “standard” sizes that may not match your products
- Include both inches and centimeters — international customers appreciate metric measurements
- Add a “How to Measure” section — show customers exactly how to take chest, waist, and hip measurements
- Update charts when products change — if a manufacturer changes sizing, your chart must reflect that
- Reduce return rate as a metric — track whether your return rate improves after adding the size chart
FAQ: Shopify Size Charts
Does Shopify have a built-in size chart feature?
No. Shopify doesn’t include a built-in size chart. You need to use an app, embed a chart image in product descriptions, or add it via custom theme code. Apps like Kiwi give you the most professional presentation with the least technical effort.
How do I add a size chart popup to Shopify?
Install a size chart app like Kiwi Size Chart from the Shopify App Store. The app adds a “Size Guide” button to your product pages and displays your chart in a popup when clicked. You build the chart inside the app dashboard using a visual table editor.
Can I have different size charts for different products on Shopify?
Yes. Most size chart apps let you assign different charts to different products, variants, or collections. This is important for clothing stores that sell multiple categories — your tops chart will differ from your dresses chart, which differs from your outerwear chart.
Does adding a size chart improve Shopify conversions?
Yes, consistently. Stores that add size charts report reduced cart abandonment, fewer “will this fit?” customer service emails, and lower return rates. The exact lift varies by product category, but apparel stores typically see 5-15% improvement in add-to-cart rate on products with clear size guides.
What information should I include in my Shopify size chart?
At minimum: size label, chest/bust, waist, and hips measurements. For bottoms: waist and inseam. For shoes: foot length in both inches and centimeters with US/UK/EU size equivalents. Add model measurements and a “how to measure yourself” guide for best results.
Final Thoughts
A size chart is a small addition that has an outsized impact on your clothing store’s performance. It takes less than an hour to set up with an app like Kiwi, costs nothing on the free plan, and immediately starts reducing the friction that causes sizing-related cart abandonment. Add it today, monitor your return rate over the next 30 days, and watch it improve.
