Size calculators for your website

Free for bike shops, ski and snowboard shops, rental desks, clubs and schools. Your visitors enter their measurements and get a size, the reason, and what else fits.

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<iframe src="https://gearsizing.com/embed/bike" title="Bike size calculator" width="100%" height="780" style="border:0;max-width:960px" loading="lazy"></iframe>
<p style="font-size:13px">Bike size calculator by <a href="https://gearsizing.com/bike-size-calculator">gearsizing.com</a></p>
<script>addEventListener('message',function(e){if(e.origin!=='https://gearsizing.com'||!e.data||!e.data.gsHeight)return;document.querySelectorAll('iframe[src^="https://gearsizing.com/embed/"]').forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.gsHeight+'px'})})</script>

<iframe src="https://gearsizing.com/embed/snowboard" title="Snowboard size calculator" width="100%" height="780" style="border:0;max-width:960px" loading="lazy"></iframe>
<p style="font-size:13px">Snowboard size calculator by <a href="https://gearsizing.com/snowboard-size-calculator">gearsizing.com</a></p>
<script>addEventListener('message',function(e){if(e.origin!=='https://gearsizing.com'||!e.data||!e.data.gsHeight)return;document.querySelectorAll('iframe[src^="https://gearsizing.com/embed/"]').forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.gsHeight+'px'})})</script>

<iframe src="https://gearsizing.com/embed/ski" title="Ski size calculator" width="100%" height="780" style="border:0;max-width:960px" loading="lazy"></iframe>
<p style="font-size:13px">Ski size calculator by <a href="https://gearsizing.com/ski-size-calculator">gearsizing.com</a></p>
<script>addEventListener('message',function(e){if(e.origin!=='https://gearsizing.com'||!e.data||!e.data.gsHeight)return;document.querySelectorAll('iframe[src^="https://gearsizing.com/embed/"]').forEach(function(f){if(f.contentWindow===e.source)f.style.height=e.data.gsHeight+'px'})})</script>

Free, with no ads and no cookies. We don’t track your visitors; the frame sends us nothing about them.
Metric first? Add ?units=metric to the address in src. For a dark page, add ?theme=dark (both: ?units=metric&theme=dark).
The one-line script makes the frame exactly as tall as the calculator, so there’s no scrollbar inside it on phones. If your site builder strips scripts, leave it out: the frame then scrolls. One copy of it is enough for several calculators on one page.
Please keep the credit line under the frame. It’s how people find the full calculator and its size charts.
Sizes come from the brands’ and shops’ published charts: how we size. A size looks wrong? Tell us.

Size calculators for your website

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What it looks like