tissue 紙巾
one is the stuff that makes the human body （人體）組織
other one we clean our face and other parts of the body 紙巾

facial tissue 面巾紙
Kleenex ：舒潔（Kleenex）是全球最知名的面巾紙品牌之一，在口語當中，直接說這個單詞，可以表示紙巾
Hey, can you pass me the Kleenex I think I have a cold.
可以給我點遞點紙巾嗎？我覺得我感冒了。

toilet paper 衛生紙
Hey, they have a sale on toilet paper today.
他們今天衛生紙在大減價呢。

napkin 餐巾紙
a square piece of cloth or paper used at a meal to wipe the fingers or lips and to protect garments, or to serve food on
西方餐桌上供應或使用的餐巾紙，也可以指那種西方人進餐時候圍在脖子上好像布一樣的東西，napkin 還有尿布的意思
He dabbed at his lips with the napkin.
他用餐巾拭了拭嘴唇。

卷紙：toilet rolls
廚房卷紙：kitchen rolls
單層：single ply
雙層：double ply