刘海剪得太短了怎么说英语

If you want to say that someone's bangs (a strand of hair that falls across the forehead) are too short, you could say:

"Your bangs are too short."

Or, if you want to be more descriptive, you could say:

"You've cut your bangs too short. They barely cover your forehead."

In both cases, "bangs" refers to the strand of hair that falls across the forehead, and "too short" means that the bangs are shorter than desired or expected.