Ответ:

  1. She has long straight black hair.
  2. He is a handsome tall middle-aged man.
  3. They met an interesting young French woman at the party.
  4. The detective noticed a small old white scar on his face.
  5. My English teacher is a quiet, slim, attractive woman.
  6. He wore a new black leather jacket.
  7. She has beautiful big brown eyes.
  8. The old man had thick bushy grey eyebrows.
  9. In the book, the villain is a scary tall thin man.
  10. The girl with lovely curly red hair is my cousin.

Порядок прилагательных обычно таков: мнение → размер/форма → возраст → цвет → материал.