waist length hair 及腰的长发
Your waist-length hair might be shorter if you're shorter.
你的及腰长发可能会短，如果你身高矮的话。

shampoo /ʃæmˈpuː/ 洗发水
conditioner /kənˈdɪʃ.ən.ɚ/ 护发素
I've been sick and tired of my current shampoo and conditioner, I'd like to try something new.
我厌倦了现在的用的洗发水和护发素，我想试试新的。

hair spray 喷发定型剂
a sticky liquid that is sprayed (= forced out in small drops) onto someone's hair to keep it in a particular shape
一种粘的液体，喷洒在人的头发上来定型。

hair gel发胶
hair wax发蜡