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TypeForge
A letter isn’t a mood — it’s a shape with measurements. Read the metrics and a font’s behaviour stops being a mystery.
📐 Open the type console →Four things you can measure about any font
- 📏 X-height. The height of the lowercase body — the real “how big does it feel.” At the same point size, the taller x-height reads bigger.
- ↔️ Kerning. The gap between two particular letters. Shapes like AV and To lean apart and need tucking closer; most pairs are fine as-is.
- 🖊️ Stroke contrast. Thick-to-thin ratio. Low contrast stays legible tiny; high contrast is elegant huge but its hairlines vanish at caption size.
- 🇻🇳 Diacritic headroom. French “é” is one mark; Vietnamese “ề” stacks two. Too little headroom and the stacked mark clips — a Latin font can silently break a language.
Meet the crew — the anatomy of a letter
- Ex is the x-height — the lowercase body everyone actually reads, and the truest measure of how big a font feels.
- Kern is the spacer who tucks the awkward pairs closer so a word reads as one smooth run, not a string of gaps.
- Hairline is the thin stroke that looks elegant on a poster and disappears in a caption — the warning about high contrast.
- Headroom is the quiet space above the capitals where the accents live, and the reason a font can break Vietnamese.
- Serif (mentor) is the old type-cutter who reminds the crew that a font is never simply good — it’s good at a size, for a language, for a job.