Down to the last, smallest, final, etc. something

Pro Tip 1/3

Complete Inclusion

Used when emphasizing that nothing has been excluded from a group or collection.

I donated all my books, down to the last one.

Pro Tip 2/3

Idiomatic Emphasis

Adds emphasis to the totality of what's being discussed, often in a dramatic or significant way.

She listened to his every word, down to the last sigh.

Pro Tip 3/3

Literary Flair

The phrase can add a touch of drama or literary quality to a sentence.

The antique collection was astonishing, down to the last stamp.