Here are five comparative idioms that are commonly used in English:

Five Comparative Idioms

Meaning: very busy or industrious. 

Example: "During the holiday season, the shops are as busy as bees with shoppers."

Meaning: very light in weight.

Example: "The package was as light as a feather, making it easy to carry."

Meaning: very clear and obvious.

Example: "Her explanation was as clear as day; everyone understood it easily."

Meaning: very calm and composed, especially in stressful situations.

Example: "Even in a crisis, he remains as cool as a cucumber and handles everything smoothly."

Meaning: very old or ancient.

Example: "That story is as old as the hills, and yet it still resonates with people today."