a wordpress plugin from hopkins action
Size Finder
Shoppers enter their measurements. It tells them which size to buy.
A size finder for WooCommerce shops that sell by fit: clothing, workwear, gloves, helmets, boots and dog harnesses. It works on any WordPress site, with or without WooCommerce.
The free version is on wordpress.org. Pro is sold through Freemius.
Launch offer: LAUNCH30 takes 30% off your first payment until 2 November 2026. It is already applied when you click through to checkout.
the problem
a size chart is homework.
Most size charts are a table and a shrug. The shopper has to find their row, decide what to do when they fall between two sizes, and convert to inches. Plenty don’t bother. They guess, and you pay for the return.
what it does
it does the maths so your shoppers don’t have to
the answer
one size, straight back
Enter your size chart once. Shoppers type in their chest, waist, height, hand or foot, whatever you measure, and get a size back without the page reloading. Your full chart shows underneath, with their row highlighted.
- A form on the page, or a “Find my size” button that opens a pop-up
- A “Find my size” link or a size guide tab on WooCommerce products
- Labelled fields and results that screen readers announce
between sizes
between sizes? it says so.
When someone sits between two sizes, Size Finder tells them, then suggests the one you would pick. You choose larger or smaller and you write the message. If they fall outside your range, it asks them to get in touch instead of making something up.
imperial
feet and inches, sorted
Metric or imperial, and it remembers the choice next time. Height goes in as feet and inches, and the size chart switches to the shopper’s units.
woocommerce
“select this size” does the clicking Pro
On a WooCommerce product, the result comes with a button. One click on “Select size M” picks M in the product’s size dropdown, so the shopper goes straight to the basket. It matches your size names to the product options, or to a product value you set per size.
Three ways to match
Every measurement must fit, best fit with weighting (chest can count double), or one measurement decides and the rest only warn.
Paste your chart straight in
A grid editor you can paste into from Excel, Numbers or Google Sheets. CSV import and export, plus starter templates for tees, gloves, shoes, helmets and overalls.
A chart per category Pro
Set one chart for each product category, then override it on any product that sizes differently.
free vs pro
free gets you going. pro runs the shop.
The free version has no time limit. Its one live chart works fully, and it never nags you to upgrade.
| What you get | Free | Pro |
|---|---|---|
| Live size charts | 1 | Unlimited |
| Draft charts, starter templates, CSV import and export | Yes | Yes |
| Every measurement type and unit, including feet and inches | Yes | Yes |
| All three matching rules | Yes | Yes |
| Shortcode and block, inline or pop-up | Yes | Yes |
| WooCommerce “Find my size” link and size guide tab | Yes | Yes |
| A chart for every product, or per product | Yes | Yes |
| CSS variables, template overrides and theme styles only | Yes | Yes |
| A chart per product category, with product overrides | No | Yes |
| “Select this size” picks the product option | No | Yes |
| Elementor widget with a full Style tab | No | Yes |
| Stats: which sizes people are told to buy | No | Yes |
pricing
pick a plan
Fit tools on Shopify charge monthly, and often take a cut of every order too. Size Finder Pro is one licence with no per-order fees. Every plan gets every Pro feature.
Yearly
Starter
1 site
£44.99 per year
- Use it on 1 website
- Every Pro feature
- For your own shop or brand
- Updates and support for a year
Most popular
Professional
5 sites
£89.99 per year
- Use it on 5 websites
- Every Pro feature
- For a handful of brands or shops
- Updates and support for a year
Agency
Unlimited sites
£150.99 per year
- Use it on as many websites as you like
- Every Pro feature
- For agencies building client sites
- Updates and support for a year
Lifetime
Starter
1 site
£135.99 one payment, updates for life
- Use it on 1 website
- Every Pro feature
- For your own shop or brand
- Updates and support for life
Most popular
Professional
5 sites
£264.99 one payment, updates for life
- Use it on 5 websites
- Every Pro feature
- For a handful of brands or shops
- Updates and support for life
Agency
Unlimited sites
£454.99 one payment, updates for life
- Use it on as many websites as you like
- Every Pro feature
- For agencies building client sites
- Updates and support for life
- Launch offer: LAUNCH30 takes 30% off your first payment until 2 November 2026. It is already applied when you click through to checkout.
- 30-day money-back guarantee. Not for you? Ask within 30 days and you get the lot back.
- Renewals are 30% off. Yearly licences renew at 30% less than the list price.
Prices exclude VAT and sales tax. Checkout and licences are handled by Freemius, which sells the licence to you as merchant of record and adds any tax due where you live at checkout. Businesses can enter a VAT number there.
built for designers
make it look like part of your shop
It uses your theme’s fonts and looks tidy as it comes. When a site has its own design, there are proper controls for matching it.
CSS variables
28 custom properties on .size-finder, and the pop-up picks them up too. The defaults sit in :where(), so any rule in your theme wins.
Block design panels
Typography, background, padding, block spacing, border and shadow, plus link and button colours. theme.json block styles work as well.
Elementor widget Pro
A Style tab with colours, box and spacing, heading, labels, inputs, button hover, result, size chart table and the pop-up. Your kit’s global colours included.
Template overrides
Copy any template into your theme and change the markup. Stable class names, state attributes, JavaScript events for analytics, and a “use my theme’s styles only” switch.
more reading
questions
the honest answers
Do I need an API key or an account anywhere?
No. Size Finder runs on your own site. Nothing about your shoppers or their measurements is sent anywhere. Pro checks its licence with Freemius, and that is it.
Do I need WooCommerce?
No. The block and the shortcode work on any page. The product features, like the “Find my size” link and “Select this size”, switch on when WooCommerce is active.
Will it work with my theme?
It uses your theme’s fonts and has been tested on Twenty Twenty-Five, Storefront and Elementor 4. In other page builders, paste the shortcode into a shortcode or text element. If you want full control, “use my theme’s styles only” hands the styling to your theme.
How many sites can I use it on?
Starter covers one site, Professional covers five and Agency covers as many as you like. You can move a licence from one site to another.
What happens when my licence runs out?
The plugin keeps working as the free version. Your charts and settings are all kept. Updates and support stop, and the Pro features switch off until you renew, so only one chart stays live on the site.
Can I get a refund?
Yes. There is a 30-day money-back guarantee. If it’s not right for you, ask within 30 days and you get your money back.
help them pick the right size first time.
Start with the free version, or go straight to Pro.
Launch offer: LAUNCH30 takes 30% off your first payment until 2 November 2026. It is already applied when you click through to checkout.