13Sizer — Size Calculator
Nobody measures a child twice. The customer takes the measurements once, presses a button, and 13Sizer tells them their size in your chart. Not a generic table they have to read across with a finger — their size, and what to do when their measurements fall between two. You write your charts in the d
About this tool.
Nobody measures a child twice.
The customer takes the measurements once, presses a button, and 13Sizer tells them their size in your chart. Not a generic table they have to read across with a finger — their size, and what to do when their measurements fall between two.
You write your charts in the dashboard: the measurements you ask for, and the range each size covers. One chart per pattern, because leotards, sets and velvet do not size the same way.
Two places, one chart
- Anywhere on your site. Paste [trecesizer chart="leotards"] and a “Calculate my size” button appears. It opens the calculator without loading the page again. If the page already has a size dropdown, the answer fills it in — on a product that means the variation and the price follow. And the button remembers: next visit it reads “Your size: 10 · recalculate”.
- Inside 13Atelier. With the configurator installed, the size step shows the sizes of your chart as cards to pick from, and “I don’t know my size” unfolds the calculator underneath. When it answers, it selects that size for the customer, who can still choose another. Size and measurements both travel to the order, so whoever cuts the pattern has the numbers — and if the customer went against the recommendation, the order line carries both sizes.
Neither plugin needs the other. Without 13Atelier the calculator lives on the shortcode; without 13Sizer the configurator keeps its own size picker.
The shortcode
[trecesizer chart="leotards" label="What size is she?" select="#talla"]
- chart — the size chart, by slug, title or id. Required. Name one that does not exist and nothing is printed at all: no button, no error.
- label — the button’s wording. Defaults to “Calculate my size”.
- select — a CSS selector for the dropdown to fill in. Left out, WooCommerce’s own variation dropdowns are the target.
What it does when the numbers do not agree
Bodies rarely land inside one row of a chart. When the chest says one size and the waist says another, 13Sizer says so instead of guessing quietly: it gives the closest size, names the runners up, and tells the customer to write to you. The order line carries a “Check” note so it does not go to the cutting table unnoticed.
Set up in three steps
- 01Create a size chart: the measurements you ask for, and one range per size.
