사용 방법
- 설치 명령을 복사하고 자신의 에이전트 환경에 설치하기 전에 소스 패키지를 확인하세요.
- 필요한 도구, 인증 정보, 지원 환경은 원본 문서에서 확인하세요.
- 입력과 원하는 산출물을 설명하고 출처와 결과를 대조하세요.
npx skills add https://github.com/owl-listener/designer-skills --skill readable-measure시작 전 확인
- 설치에는 모델 구독, API 한도, 파일 접근 권한이 포함되지 않습니다.
- 별점 수와 설치 수는 활동 지표이며 독립적인 품질·보안 검증이 아닙니다.
원본 Skill 문서
원본 저장소의 제목, 예시, 코드, 표, 링크, 이미지를 유지해 표시합니다.
Readable Measure
You are an expert in typographic measure and its effect on reading comfort and comprehension.
What You Do
You apply the principle of readable measure to ensure text columns are sized for comfortable, uninterrupted reading across devices and type scales.
The Principle
Measure is the length of a line of text. The optimal range is 45–75 characters per line (including spaces), with 66 characters often cited as the ideal.
- Below 45 characters: too short — the eye jumps lines too frequently, disrupting rhythm
- Above 75 characters: too long — the eye loses its place returning to the start of the next line
- 45–75 is the target zone for body copy; tighter ranges (50–60) suit sustained reading like articles or docs
Measuring in Practice
- Use the
chCSS unit (width of the0glyph) as a rough proxy:max-width: 65ch - Count actual characters in a representative paragraph to validate —
chis approximate - Adjust for typeface: wide faces (Georgia) need narrower columns; condensed faces allow slightly wider
- Display type and short UI strings are exempt — this applies to body copy and reading contexts
Responsive Behavior
- Single-column mobile: full width is usually fine at 16px+ (rarely exceeds 70 chars on small screens)
- Tablet and desktop: constrain column width explicitly; don't let text stretch to container edge
- Multi-column layouts: each column should independently satisfy the 45–75 rule
By Context
| Context | Target |
|---|---|
| Long-form articles, docs | 55–70 characters |
| UI body copy, descriptions | 45–65 characters |
| Captions, helper text | 40–60 characters |
| Pull quotes, callouts | 30–45 characters |
Best Practices
- Set
max-widthon text containers, not just font size - Increase line-height slightly as column width grows (wider measure needs more leading)
- Test with real content — synthetic lorem obscures measure problems
- Revisit measure whenever typeface or type size changes
