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Paragraph line-height and measure rules, shown as three lorem text blocks (correct width, too narrow, too wide) with red strikes on the wrong two.
Summary
The paragraph counterpart to the headline line-height page: three Whitney lorem blocks demonstrate correct measure versus too-narrow and too-wide settings, the latter two crossed out in red.
Visual description
White-left / near-black-right split. The left column shows the "04 TYPOGRAPHY" eyebrow, a stacked two-tone "USAGE / LINE HEIGHTS & RULES FOR PARAGRAPHS" headline, notes on a 135% paragraph line height and a 50 to 75 character (about 11 word) measure, and a short numbered list (right width, too narrow, too wide). The right side arranges three grey lorem-ipsum blocks on the dark panel: a well-proportioned block (green numbered marker), a tall narrow column struck with a red diagonal (red marker), and a wide full-width block also struck in red (red marker). The widths visibly contrast the comfortable measure against the broken ones.
Key takeaway
Showing optimal line length as one good block flanked by a too-narrow and a too-wide failure, all using the same copy. The red strike on the two wrong measures makes the readable-width sweet spot obvious without measuring.
Reuse notes
A clear way to specify both line height and line length (measure) for body copy in a guideline. The good/narrow/wide triptych is reusable for any typesetting rule about width. Keep the body copy identical across the three so only the column width changes.
From this deck: Line height rules for paragraphs
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