Stat

A stat is a number promoted to a headline. The value is set several steps larger than anything around it, the label under or over it says what was counted, and an optional third part says which way it moved and by how much. Put four of them in a row and you have the top of almost every dashboard ever shipped, which is why the component is worth naming: it is the unit those pages are assembled from, not a one off piece of layout.

The parts have a fixed job each. The label must name the measure and its scope (“Revenue, last 30 days”), because a number with an ambiguous denominator is worse than no number. The value should be formatted for reading rather than for accuracy: thousands separated, currency marked, long figures abbreviated, and set in tabular figures so a value that updates does not shuffle the digits beside it. The change indicator needs a baseline, and up is not automatically good, so colour and arrow direction have to be decided per measure rather than by the sign.

Sizing the number is the design decision people get wrong. The point of the large type is that one glance reaches the value, so the label and the delta must stay noticeably smaller and the whole block must not compete with the next one along. If every stat on the page is emphasised, none of them is, and a grid of eight identical big numbers is a table that has forgotten it is a table.

A stat is a summary, not a chart. It answers “where are we now” and leaves “how did we get here” to the sparkline beside it or the detail view behind it. If the reader needs the shape of the series to understand the number, the number alone was the wrong component.