For hat, helmet, and wig brands, manufacturers, and retailers
Give shoppers camera‑based size recommendations
Most shoppers don't carry a measuring tape, and every brand sizes differently. TWIWT measures head circumference and shape through a phone or laptop camera in seconds, matching the result directly to that product’s size chart.
No app download required · No photos or video saved · Runs directly in the browser
Built for online stores where fit determines the purchase
Hatters, helmet manufacturers, and wig specialists use TWIWT to help shoppers overcome sizing hesitation before placing an order.
Canada
Japan
USA
Canada
USA
Turn hesitation into completed orders, Fewer bracketed orders and returns, Clarity across different size charts
Turn hesitation into completed orders
Shoppers who receive an immediate size recommendation can check out right away, without leaving the page to search for a measuring tape.
Fewer bracketed orders and returns
When customers know which size matches the product they’re looking at, they don’t need to order two sizes “just in case.”
Clarity across different size charts
Remove the friction of inconsistent sizing between brands by giving shoppers a direct recommendation calculated for that specific product.
Three simple steps on your product page
Measurement works in both mobile and desktop browsers
Open the tool
The shopper taps "Find my size" beside the standard size selector on your product page. No separate application or account sign-up is required.
Guided camera check
Following clear on-screen prompts, the shopper completes a quick head turn using their mobile or desktop camera. Measurement takes just a few seconds.
Immediate product-specific size
TWIWT matches the measured dimensions against the size chart assigned to that specific product and displays the recommended size.
Turn your existing size charts into automatic recommendations
You do not need to rewrite your sizing tables or switch to another platform. TWIWT integrates with your existing size charts and maps customer measurements to the specific product displayed.
For retailers carrying multiple brands, one universal chart rarely fits the whole store. Different manufacturers define small, medium, and large differently. TWIWT associates each chart with a particular brand, collection, or SKU, so customers receive recommendations tailored to the item they are viewing.
Measured circumference: 55.4 cm
| Givi 80.1 Carbon Helmet | |
|---|---|
| XS | 53–54 cm |
| S — recommended size | 55–56 cm |
| M | 57–58 cm |
| L | 59–60 cm |
| XL | 61–62 cm |
Head shape matters as much as circumference for helmets
Two riders with identical 56 cm head circumferences can experience different pressure points in the same helmet. Motorcycle and equestrian brands frequently design shells around distinct internal profiles: round, intermediate oval, or long oval.
TWIWT verifies the head profile along with circumference during the camera scan. If a helmet model has shape-specific sizing rules, the widget considers the head profile when making recommendations.
Important: Online size guidance for helmets and protective headgear assists with initial sizing but does not substitute the manufacturer's safety instructions or a physical fit check prior to use.
Easy to set up, complete control over your charts
- Single snippet installation: Insert a single, lightweight JavaScript snippet into your storefront, compatible with Shopify, WooCommerce, Magento, PrestaShop, and custom headless setups.
- Product catalog sync: Connect your product feed and map your existing size tables by brand, category, or individual product ID.
- Standard charts are accessible: Shoppers who prefer manual measurement or disable camera access can still view your traditional size guide.
- Custom brand styling: Configure widget colors, typography, and logo directly in the merchant dashboard to ensure the experience matches your store theme.
Give your Shopify shoppers fit clarity before they buy
TWIWT Head Measurement runs directly in your customer’s browser to measure circumference and head shape, matching them to the right size for each product without bracketing or hesitation.
Install Head Measurement on your storeThe evidence behind sizing clarity
Research indicates that clearer fit information can reduce purchase uncertainty and support improved conversion, order-value and return outcomes.
Clearer fit guidance improves purchase decisions
In randomized field experiments, online shoppers provided with structured fit guidance and size recommendations completed purchases at higher rates and generated fewer returns.
Harvard Business School (2018)Perceived fit risk is a primary barrier to purchase
Academic research indicates that uncertainty around fit drives both cart abandonment and intentional bracketing (purchasing multiple sizes to return the misfit).
ScienceDirect (2024)80% of retailers report conversion gains
Among apparel and accessory businesses already using size recommender tools, 80% reported an increase in online conversion rates.
Coresight Research (2023)How sizing clarity changes the order outcome
How sizing clarity changes the order outcome
See head measurement working with your products in 48 hours
Send us your store address. Within 48 hours of receiving your catalog details, our integration team will set up a private, branded preview link showing TWIWT running with your actual products and size charts. Review the link on your own time, or walk through it together on a short call.
Frequently asked questions
Does this replace our existing size charts?
No. TWIWT works alongside your current size guides. Conventional size charts remain available for shoppers who prefer to measure manually or do not grant camera access. TWIWT simply provides an automated, camera-based recommendation matched to those same charts.
How does the tool handle multiple brands with different sizing?
You can configure different size charts for each brand, vendor, or product line in your store. When a shopper opens the widget, TWIWT reads the product identifier and maps the measured head dimensions to that specific product's chart.
How does head-shape detection work for helmets?
Alongside circumference, TWIWT assesses head profile (round oval, intermediate oval, or long oval). If a helmet model uses shape-dependent sizing rules, the widget factors this profile into the recommendation. For protective helmets, this recommendation supports size selection but does not replace the manufacturer's fitting instructions or an in-person safety check.
What categories are supported?
The tool supports any product where head dimensions govern size selection: wide-brim hats, fitted caps, beanies, motorcycle helmets, bicycle helmets, ski/snowboard helmets, equestrian helmets, and wigs or wig caps.
What happens to customer camera footage and images?
No photos or videos are stored. Face mapping runs on the customer's device. Data does not leave the device except for LLM inference, where it is neither stored nor used for training.
What technical work is required from our development team?
Installation requires adding a single line of JavaScript to your storefront template. Product size charts can be synced using your existing product feed or uploaded directly in the merchant dashboard. Our integration team assists with catalog mapping for stores with complex multi-brand charts.
Which ecommerce platforms are supported?
TWIWT runs on Shopify, WooCommerce, BigCommerce, Magento, PrestaShop, and custom headless architectures.
What happens when a shopper denies camera permissions?
The widget displays a clear prompt explaining that camera access is needed for automated measurement, while keeping your manual size chart and measuring instructions immediately accessible.
What happens after I request a demo?
Our team reviews your storefront and size charts, then builds a working preview showing head measurement on your actual products. You receive a private demo link within 48 hours to test on desktop and mobile. If you prefer a guided walkthrough, you can schedule a call to review customization options and integration details.
How is TWIWT priced?
Pricing is tiered based on monthly measurement volume and catalog size. Following your branded demo, we provide a transparent quote tailored to your store's traffic.