rem, px or relative units for each kind of value. Use when defining spacing and sizing tokens, control heights or media queries, or when a layout breaks under enlarged text.
Install
npx skills add dembrandt/dembrandt-skills --skill sizing-unitsnpx skills add dembrandt/dembrandt-skills --skill sizing-units -a claude-code -gnpx skills add dembrandt/dembrandt-skills --skill sizing-units -a codex -ggemini skills install https://github.com/dembrandt/dembrandt-skills.git --path skills/sizing-unitsgh skill install dembrandt/dembrandt-skills sizing-unitsgit clone --depth 1 https://github.com/dembrandt/dembrandt-skills /tmp/dembrandt__dembrandt-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/dembrandt__dembrandt-skills/skills/sizing-units ~/.claude/skills/sizing-units # Claude Code
cp -R /tmp/dembrandt__dembrandt-skills/skills/sizing-units ~/.agents/skills/sizing-units # Codex, Cursor, Gemini CLI, Copilot, OpenCode