Like two peas in a pod means so alike that you can hardly tell them apart. They are like two peas in a pod.
It is used of looks and of temperament, and often of both together. Real peas in one pod are near-identical, which is why like two peas in a pod works so well.
1phraselike two peas in a podSo alike that you can hardly tell them apart.
“The two cousins were like two peas in a pod from the start.”
like two peas in a pod is a phrase.
Practised in Idioms