Idioms # 1: TWO PEAS IN A POD

so similar as to be indistinguishable or nearly so.

1. "they were two peas in a pod, both with the same high cheekbones and hairline"

Source: https://languages.oup.com/google-dictionary-en/

Next Idiom: https://read.cash/@Apfelbaum/idioms-2-to-have-a-lot-on-your-plate-11e932e2