designer to identify points to look for and so facilitates typeface choice for different purposes.
Although the size of type is described by a common system (usually in points), you need to be aware that different typefaces at, say, 10 pt, may look quite different in size (sec examples above). This happens because of the relative proportions of the characters. Helvetica, for instance, has a large x-height and comparatively short ascenders and descenders, whereas some Garamonds have a relatively small x-height and longer ascenders and descenders. These differences in proponion result in differenL typographic colour when text is set- d1e bigger t-he x-height, the more open the texture and colour, malcing it essential to look at different sample settings. For the same reason, the number of characters that will fit on a given line length varies between typefaces at the same Size. Even if this makes little difference to small amounts of copy, it can make a considerable difference to many pages of text.