How Many Title Tag Characters Will Google, Yahoo, Bing Display in a Search ?...

Google Search Engine Meta Tag Limitations:
Google accept 69 Characters (Including Spaces) for title.
Google accept 156 Characters (Including Spaces) for Description.

Yahoo Search Engine Meta Tag Limitations:
Yahoo accepts up to 72 Characters (Including Spaces) for a title. (PDF’s accept up to 75 characters)
Yahoo accepts up to 161 Characters (Including Spaces) for Description.

Bing/MSN Search Engine Meta Tag Limitations:
Bing accepts 65 Characters (Including Spaces) for title.
Bing accepts up to 150 Characters (Including Spaces) for Description.
Bing will readily show 69 characters for the Title Tag and up to 185 for the description.

You can use Effective Meta Tags: 
Meta Title tag = 65 char max recommended
Meta Description Tag = 160 char max recommended
Meta Keywords Tag = No issue…

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This table shows how the maximum title length in the major search engines has changed over time:
Year	Google	Bing	Yahoo
2007	66 chars	65 chars	120 chars
2008	66 chars	65 chars	72 chars
2009	71 chars	65 chars	72 chars
2010	71 chars	67 chars	65 chars
2011	71 chars	70 chars	Uses Bing results, so inherits Bing limits
2012	Visible width up to 70 chars	70 chars
2013	Visible width up to 70 chars	Visible width up to 71 chars