Google limits SERP titles by pixel width, not by character count
The original post is below, but for the impatient folks…here’s the quick answer. This post’s title is 107 characters long. In the past, Google would have cut off the SERP title after 70 characters. But now, Google shows the entire title–all 107 characters. You can verify this for yourself by clicking here. Based on this experiment, it is reasonable to assume that Google no longer cares how many characters are in your SERP title; all it cares about now is how wide (measured in pixels) your title is.
Sources:
http://www.seomofo.com/experiments/serp/google-snippet-01.html
http://www.seomofo.com/experiments/serp/google-snippet-02.html
http://www.seomofo.com/experiments/serp/google-snippet-03.html
http://www.seomofo.com/experiments/serp/google-snippet-04.html
http://www.seomofo.com/experiments/serp/google-snippet-05.html
http://www.seomofo.com/experiments/serp/google-snippet-06.html
http://www.seomofo.com/experiments/serp/google-snippet-07.html
http://www.seomofo.com/experiments/google-serp-max-characters.html
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