うりふたつ

瓜 二 つ

  1. nouns which may take the genitive case particle 'no'

    exactly alike (in appearance), like two peas in a pod, (practically) identical, spitting image (of), carbon copy (of)
    idiomatic expression

    • あの双子は瓜二つだな。
      Those twins look like two peas in a pod.