I tested the following fonts using my aspect ratio tester with a 100px Windows font size, using the Mozilla browser for Windows (in May of 1999).
Hopefully, all the values are only plus or minus 1px, but I could be off by two. "exact" means I enlarged the image rather than judging pixels.
These data show the ratio of the requested height of the font to the actual height of the font returned (as given by its metrics, I assume). That is, all the fonts here should be separated by 100px, but Mozilla uses the height from the font metrics (?) to determine the actual line-height, so the separation of the lines shows how big the font claims to be.
Differences between requested and actual font size cause a number of problems for browsers. If browsers
ex units or the
font-size-adjust property, computation of aspect
ratios or x-heights would be an additional such problem. The
aspect ratio that uses the requested font size is just the
number in the "x-height" column divided by 100. The aspect
ratio that uses the actual font size is the one given in the
"Aspect Ratio" column.
See a post I made to c.i.w.a.s for an explanation of the issue from the beginning.
|Name||x-height||Font Size||Aspect Ratio|
|Comic Sans MS||50 (approx)||140||0.36|
|Goudy Old Style||40||112||0.36|
|Lucida Blackletter||54 (approx)||114||0.47|
|Lucida Bright||53 (exact)||113 (exact)||0.47|
|Times New Roman||45 (exact)||114 (exact)||0.39|
(Back to CSS Information, David Baron)
LDB, email@example.com, 1999-05-21 (?), 1999-10-09