also: ちょうどよい
expression, i-adjective (yoi/ii class)
just right; perfect (fit, timing, amount)
Used when something is exactly as desired in terms of size, time, quantity, or condition. Often appears in casual conversation.
この靴はサイズがちょうどいい。
These shoes are just the right size.
今の時間がちょうどいい。
Now is the perfect time.
砂糖はこれくらいでちょうどいい？
Is this amount of sugar just right?
Full kanji spelling with the よい reading.
Combination of the adverb ちょうど (exactly) and the adjective いい (good). The phrase is a straightforward compound with no unusual historical derivation.