你的裙子（长裙，短裙）很漂亮，怎莫说？

Your skirt is very beutiful
长裙：longuette

n.
( 长及腿肚子的)半长女裙( 或连衣裙)

Your hair style is very cool.
Your glasses looks well on you.
man:You are so handsome
woman:You are so beautiful.
You have a good looking
You are so cute.(比较流行的说法，女）

我

不会

it's so nice of your shoes(long skirt,short skirt...)
your hairstyle is really cool.
your glasses is really nice.
男的:you are so handsome.
女的就多了：you are so pretty.
you are gorgeous.很多。。。

Your skirt/glasses/shoes is/are very nice/beautiful.
Your hairstyle is very cool.
男的:You are so handsome.
女的:You are so pretty/nice/beautiful.
You are gorgeous.(最流行的）

最经典的 也是最让人快乐的一句是：你很美