Head measurements
Head measurements for helmet and hat sizing
Head sizing matters for comfort and for protective equipment that has to sit correctly.

Chart-based guidance alongside manufacturer fitting instructions
Helmets, caps and other headwear depend on head measurements that shoppers rarely know. UniMeasureAI captures head measurements in the browser and compares them with your size chart, giving the customer sizing guidance before the order rather than after an uncomfortable fit has already shipped.
How it works for your store
- Choose the relevant headwear or helmet measurement type and supply the manufacturer’s size chart for the product.
- The shopper follows that head-capture workflow in their browser. Headwear measurement includes head circumference; confirm the required outputs for a particular helmet chart before setup.
- Match the supported measurements to the product chart, then have the shopper follow the manufacturer’s fitting and adjustment instructions.
Requirements and limitations
A hat and a protective helmet have different fitting requirements. Chart-based sizing is not a safety certification or a substitute for checking the helmet’s position, retention and fit under the manufacturer’s instructions. Helmet measurement types are available from Growth; headwear support depends on the current plan.
Questions about helmets & headwear
Other product categories
See it working on a real storefront
Try the live demo store, or book a 30-minute call and we will walk through your size charts and product range.
The demo store asks for a password: test