Hi! There is no easy answer - vertical metrics are always tradeoffs, and since your font supports Vietnamese diacritics which are very tall - see attached viet.png - then the vertical metrics around the 'plain' Latin glyphs - see attached latin.png - are seemingly too tall. But if you adjust the vertical metrics, the vietnamese glyphs will be clipped on some systems. My colleague at Google Web Fonts, Raph Levien, did some research on this which is published here: http://code.google.com/p/googlefontdirectory/w/edit/VerticalMetricsRecommendations Cheers Dave
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viet.png
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latin.png
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