Just Right, Exactly Right
expression, い adjective
If 丁度 is "exactly", then "exactly good" is going to be just the right amount, aka just right.
ちょうどいい
If you know the reading for 丁度 you'll know the reading for this too. Your knowledge should be just right, as they say inside my head.
大きすぎず、小さすぎず、本当に丁度いいサイズです。
It's not too big or too small. It's just the right size.
あっ、丁度いい所に来たね！
Oh, you came at the right time!
このぐらいの温度が丁度いいですね。
This temperature is just right.