Airplane seats are shrinking – how small can they go?

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http://img-s-msn-com.akamaized.net/tenant/amp/entityid/BBEIyhC.img?h=100&w=100&m=6&q=60&o=f&l=fWhen Boeing designed its first 737 it had 50 to 60 seats ? but the 700 series now holds 137 passengers. Here?s how aviation companies have been shrinking seat size

أكثر... (http://www.msn.com/en-ca/lifestyle/lifestylegeneral/aeroplane-seats-are-shrinking-%E2%80%93-but-how-small-can-they-go/ar-BBEKjzn?srcref=rss)