Kilroy8 is based on Roboto Serif.

Regular and Italic: 90% width, optical size 8, weight 400, grade +75

Bold and BoldItalic: This is based on the stock static TTF renderings of Roboto Serif (100% width, optical size 20, weight 700, grade 0 I believe)

This is a heavily subsetted version of Roboto Serif to minimize font loading time; only support for English and Spanish is provided by the font. See kilroy8-chart.pdf for the characters provided by this subset.

Numbers are tabular and lining. Also, a bug in the Roboto Serif font with → is fixed.

I had to make the ttfwidth for Kilroy8-Bold(Italic) 4 instead of 5 so that Firefox will always correctly load the font set.