My sister's hair is longer than (yours).
My sister's hair is longer than YOUR HAIR.
My sister's hair is longer than (ours).
My sister's hair is longer than OUR HAIR.
My sister's hair is longer than (hers).
My sister's hair is longer than HER HAIR.
My sister's hair is longer than (our hair).
My sister's hair is longer than OURS.
My sister's hair is longer than (their hair).
My sister's hair is longer than THEIRS.
My sister's hair is longer than (mine).
My sister's hair is longer than MY HAIR.
My sister's hair is longer than (theirs).
My sister's hair is longer than THEIR HAIR.
My sister's hair is longer than (her hair).
My sister's hair is longer than HERS.
My sister's hair is longer than (his).
My sister's hair is longer than HIS HAIR.
My sister's hair is longer than (his hair).
My sister's hair is longer than HIS.
My sister's hair is longer than (your hair).
My sister's hair is longer than YOURS.
My sister's hair is longer than (my hair).
My sister's hair is longer than MINE.