explanation for font: bold 12px/25px "Arial"; [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:

What does this size mean in css {font: 14px/24px Arial, Helvetica, sans-serif}

i see around the website there is CSS like this

 .selector {font: bold 12px开发者_如何学JAVA/25px "Arial";}

i understand bold mean font-weight and "Arial" is Font-family.

but what about 12px/25px ?

can someone please explain what is that mean?

thank you in advance,

GusDe

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The two figures in 12px/25px represent font-size and line-height.

This is the standard short-hand notation for the font style. See here for a breakdown of all possible options: http://www.impressivewebs.com/css-font-shorthand-property-cheat-sheet/

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The part before the slash is the fontsize and the part after it the line height.

See the docs here:

http://www.w3.org/TR/CSS2/fonts.html#font-shorthand