The curtain length option is depend on different occasions. Home decorative length is usually about 3 meters cause curtain high is within it for home decor. Some special occasions are not good to use those common curtain within 3 meter length. These houses have very high ceiling to make house look magnificent. So long curtains are right for here.
The main occasions where can be used long curtains in currently:
First:Villa's living room
The villa renovation is exquisite project and has highly grade of layout. The living room ceiling is two times tall to two floors of the common house. Has the same payout as the duplex house payout. Therefor, those villas are mostly use long curtains for home decoration, and only the long curtains are right for those occasions.
Second:long curtain are mostly use for church where has stepped design and has very high ceiling. Only the long curtain can cover over the tall and big windows.
Third is the cinema that has the same internal structure as the church. And long must use long curtain to hang up in front of the big window.