What's the normal sofa size in Euramerican countries?

Could anyome tell me the normal furniture size in European & American countries, such as the sofa size.
-u1{:f4X+{/g'a0e 2Aa#S1] vPX:t
It's urgent, thx a lot!!!!!

6 ft is a standard loveseat,8 ft sofa for 3 seater,that is my former US customer's require.