Shopify app for apparel stores
The right size, before they buy.
Turn your size chart into instant recommendations on every product page. Shoppers stop guessing, returns stop piling up.
View on App StoreEnter both measurements to see a recommendation.
A working copy of the storefront widget, using a sample denim chart.
How it works
- 1
Upload your size chart
Import the CSV you already have. MatrixFit validates it and stores it as a reusable size matrix.
- 2
Assign it to products
Pick the products or collections each matrix covers. The widget appears on those product pages automatically.
- 3
Watch the fit data work
Shoppers enter two measurements and get a size with a confidence score. Analytics shows which sizes convert.
It lives on your product page
No theme code edits. The widget installs as a theme app extension, matches your store's look, and pre-selects the recommended size on add to cart.

Pricing
Start free. Upgrade when you need more than one size matrix.
Free
$0 forever
- 1 size matrix
- Size finder widget
- 7-day analytics
- Email support
Plus
$9.99 / month
- Unlimited matrices
- 90-day analytics
- Live chat support