Embed the size converter
Add a free ring, shoe and hat size converter to your blog or store with one line of HTML. It runs entirely in the visitor's browser and keeps working forever.
Live preview
This is the exact widget your visitors will see:
Copy this code
Paste the snippet into your page where you want the converter to appear. No script tag, no dependencies, nothing to maintain.
<iframe src="https://mysizecharts.com/embed/widget.html" title="Size converter by SizeCharts" width="420" height="360" style="border:0;max-width:100%" loading="lazy"> </iframe>
Dark theme
Add ?theme=dark to the URL to force dark mode, or leave it off to follow the visitor's system preference.
<iframe src="https://mysizecharts.com/embed/widget.html?theme=dark" ...></iframe>
Terms
The widget is free to embed, including on commercial sites. It carries a small "Powered by SizeCharts" link, which we ask you to keep, since that link is what keeps the tool free. For raw data instead of a widget, see the free JSON API.
Last reviewed and updated on July 2, 2026. The widget is regenerated with each site build.