Units, Size Systems, and Markets

Units in Qivra Size Chart follow one principle: the unit belongs to each column, and conversion belongs to the shopper. You enter numbers once, in the system you have them in — everyone can read them their way.

The three layers

Editor — you declare the unit system you entered (Metric or Imperial) and a unit per column: cm, in, mm, ft, kg, lb, or No units. See Chart editor guide.
Master template — you choose the default system shoppers see first, how the other system is displayed, fractions/decimals, and per-market overrides. See Appearance.
Storefront — the chart renders with the right system at page load (based on market or default); switching systems needs no page reload and no server call.

Length and weight pairs

You enter	Shoppers can switch to
cm	in (and mm/ft where meaningful)
in	cm
kg	lb
lb	kg
No units	never converted — shown as typed

A single table can mix pairs — a Bust column in cm next to a Weight column in kg; each converts on its own.

Size systems

A chart can carry several systems — Alpha, US, UK, EU, FR, IT, DE, JP — one label per size row. On the storefront:

Shoppers switch systems with pills inside the chart (if the switch feature is enabled in Appearance).
Systems you didn’t add to the chart simply don’t appear.
Only the systems you pick in the editor’s presets are shown — pick Alpha + US + UK + EU + JP for international apparel, or Alpha only for a simple XS–XL chart.

Market-aware defaults

Enable Pick the system from the shopper’s market (Appearance → Units) and:

A shopper in your US market sees inches first.
Everywhere else sees centimetres (or your chosen default).
Add per-market overrides for anything else — CA, GB, AU… each mapped to Metric or Imperial.

The choice happens when the page renders — not after, via JavaScript — so the first paint already has the right system and nothing shifts.

Fractions and decimals

Show inches as fractions — 33½" instead of 33.5". American shoppers read garment sizes as fractions; decimals look like spec sheets.
Decimal places — 0, 1, or 2, applied to converted values.
Unit symbol — in the column header (cleanest), next to every number, or hidden (when the header already says it).

Which display mode for the second system?

Mode	Shopper sees	Best for
A switch above the table (default)	One system at a time; tap to flip	Most charts — keeps tables narrow
Both, inline text	`86–91 cm (34–36 in)` in the same cell	Few-column tables; no tap needed

“Both, in separate cells” is not offered — it doubles the column count and fights the sticky size column on mobile.