Akademik

Сапог лаптю не брат
See Гусь свинье не товарищ (Г)
Cf: Everyone to his equal (Am.). Every sheep with its like (Am.). Geese with geese, and women with women (Br.). Tigers and deer do not stroll together (Am.)

Русско-английский словарь пословиц и поговорок. . 2013.