A spacing scale is the rhythm of available distances. Most catalogued sites use a 4-px or 8-px base unit; Linear uses an unusual 2-px floor (scale 2/4/6/8/10/12/14/16/19/22/24/26) for micro-density. Stick to the scale: every magic number degrades the discipline. AI2 Design's brief's `constraints` field hard-codes the observed scale so an AI agent can't invent off-scale values.
Glossary · spacing
Spacing Scale
The fixed set of pixel values (e.g. 4 / 8 / 12 / 16 / 24 / 32 / 48 / 64) a design system uses for padding, margin, and gap.
Catalogued examples
2 catalogued sites demonstrate spacing scale in production.