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readable-measure
GitHub提供排版可读性度量指导，确保正文行长在45-75字符间以优化阅读体验。涵盖响应式布局、字体调整及不同上下文的目标值设定，辅助前端开发优化文本容器宽度与排版细节。
触发场景
调整正文行宽或最大宽度
优化长文或文档的排版可读性
设置响应式断点下的文本列宽
安装
npx skills add Owl-Listener/designer-skills --skill readable-measure -g -y
SKILL.md
Frontmatter
{
"name": "readable-measure",
"description": "Set line length and measure for comfortable reading across type sizes and breakpoints. Use when tuning body text. Covers measure only — for the full size and weight scale, use `typography-scale`."
}
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
版本历史
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20e34c4
当前 2026-08-19 23:23
强化技能描述，明确使用场景与边界，解决与其他排版相关技能的冲突，规范元数据格式。
- acc3e57 2026-07-25 05:16
