On a product page
What it looks like in a store
The size guide opens next to the size picker and takes on your store's look. These are the real widget, not mockups.
Fit and sizing problems are among the most common reasons people send clothes back. Answer the question on the product page, before checkout.
Example store. The panel on the right is the Fitmark widget.
How to measure: wrap the tape around the fullest part of your chest, under the arms, keeping it level.
Copy the size table from a supplier email or spreadsheet, upload a photo, screenshot or PDF of it, or start from one of seven templates. Fitmark reads the sizes and measurements and builds the chart. Edit the text on the left to see it update.
The size guide opens next to the size picker and takes on your store's look. These are the real widget, not mockups.
Install from the Shopify App Store. The size guide appears on product pages through a theme block. No code.
A WordPress plugin that connects to your Fitmark account, so you pick which products get which chart.
Wix, Squarespace, Webflow or a custom site, with one line of code before </body>.
Some size chart apps add charges that grow with your store's orders, even orders that never used the size guide. Fitmark is one flat price on every plan.
Take a screenshot of each chart in your current app, or keep the supplier PDF, and upload it. Fitmark reads the table; you check it and save.
"Find my size" and auto-assign rules are part of Pro. Analytics and 14 languages are in Studio, with no usage tiers to watch.
Founding priceJoin by 31 January 2027 and keep it for as long as you stay on Pro.
Founding priceJoin by 31 January 2027 and keep it for as long as you stay on Studio.
The widget is one script under 10 KB that loads after the page, served from Shopify's own CDN. The chart is built into the product page, so shoppers never wait on our server.
Yes. Upload a screenshot of each chart from your old app, or paste the table, and Fitmark rebuilds it in seconds. Check the numbers, choose the products, save.
It compares the shopper's height, weight or chest with your chart and their fit preference, then "Choose size" selects that size in your product's size picker. You can turn it off in the theme editor.
The guide comes in English, German, Spanish, French, Italian, Dutch, Portuguese, Swedish, Danish, Polish, Japanese, Korean, Chinese and Indonesian. Pro uses your store's main language; Studio follows each shopper's language.
You move back to Free. Every chart stays on your products and you can keep editing them; the size finder turns off, the small badge returns, and new charts need Pro once you have more than 3. If you uninstall, Shopify asks us to delete your store's data 48 hours later, and we do.