wafer-thin

adj.very thin

"wafer-thin sheets of metal"

adv.very thin

"it was cut wafer-thin"

1. The paper was wafer-thin and easily torn.
   这张纸薄如薄片，轻易就被撕裂了。
2. The difference between the two proposals is wafer-thin.
   两个提案之间的差距微乎其微。