What should be the lenght of Description and Keyword Meta tags?

[deven75]

Hi friends,
Can any one tell me the exact what should be the lenght of Description and Keyword Meta tags?

 

[Michael]

Appropriate length for Meta description tag is 160-170 characters with spaces and approx. 250 characters with spaces in Meta Keywords tag.

 

[davidweb09]

Google read max. 160 characters in meta description tags a any website. Mexico Auto Insurance

 

[Medical]

Meta description tag is 160-170 characters and
approx. 250 characters with spaces in Meta Keywords tag

 

[traveloweb]

Bing uses meta keywords tag as a spam signal. ... Meta descriptions can be any length, but search engines generally truncate snippets longer than 160 characters. It is best to keep meta descriptions between 150 and 160 characters.