Sizemint provides two tools for helping WooCommerce shoppers choose the right size: a product size chart and Fit Finder, which recommends a size from the shopper’s measurements.

Sizemint keeps its feature set focused on size charts and size recommendation, and its core features are free, not a time-limited trial.

Size Chart:

Build a size chart with a simple, click-and-type table editor — no code required.
Assign a chart to an individual product, or to an entire product category as a fallback.
Choose how charts appear, store-wide: as a popup (button opens a chart window), as their own product tab, or not automatically at all.
Place any chart manually anywhere on your site with the [sizemint_chart] shortcode, independent of the display setting above.
A clean, styled table out of the box — shaded header row, alternating rows for readability, and the chart’s own title shown clearly, not a bare grid of numbers.

Fit Finder:

A shopper enters their own measurements and gets a direct size recommendation — not just a table to read themselves.
Supports up to six measurement types per product — Chest, Waist, Hip, Height, Sleeve Length, and Inseam — and only asks the shopper about the ones that actually apply to that product.
The recommendation engine never averages measurements against each other: one dimension being clearly wrong for a size can’t be masked by the others looking fine, so a shopper is only ever told a size with genuine confidence, or told plainly that nothing fits confidently.
Works in centimeters or inches, on both the merchant’s table and the shopper’s own input, converting automatically between them.
On a variable product, Fit Finder checks the recommended size against what’s actually currently purchasable, and says so plainly if the size it would otherwise recommend isn’t available right now.
A Size Chart can optionally be linked directly to a Fit Finder table, so the same measurement data powers both — the chart then shows the real ranges (e.g. “88–96 cm”) instead of a separate, hand-maintained table.

Chart data — and Fit Finder measurement data — is checked before it’s saved: an incomplete or invalid entry is rejected, and the previously saved version is kept. Core features are free — permanently.

Sizemint Size Chart