21 июля 1925 года СССР присоединился к Международной метрической конвенции

For that reason, the Council of People’s Commissars issued a special decree to accustom people to the meters and centimeters. Later, they took certain educational measures. There were advertising verses everywhere, even on the candy wraps. Such as the couplet by Mayakovsky:

“So that everyone can remember —

There are four centimeters in a vershok.”