Changing Font in WP Twenty Eleven

I must have the worst luck. I wanted to change the font size, weight, and line height.

I went to Appearance, then to Editor, then found the heading “Global” and made the adjustments. I used the CSS number option to adjust the line height; that worked. I then changed the font size from 14px to 16px and the font style to Aparajita here: font: 16px Aparajita, Times New Roman, Arial Unicode MS, Aparajita. The result was that that the font size appeared smaller at about 9px.

What went wrong? Does anybody know?

Thanks.