ÌÅÐÈÒÜ ÍÀ ÑÂÎÉ ÀÐØÈÍ
[m'erit' na svoy arshyn]
To measure by one's own arshin (arshin - a ruler one arshin in length equivalent to 28 inches).
To judge others by oneself; to apply one's own standard to others.
Cf. To measure another's corn by one's own bushel.