called шкалик (shkálik) and amounted to 61.5 ml, while a double was called чарка (chárka) and was equal to 123 ml — both names are still occasionally used...

1⁄200 3+3⁄4 61.5 ml 2.16 fl oz 2.08 fl oz kosushka косу́шка shot charka ча́рка wine glass 1⁄100 7+1⁄2 123 ml 4.33 fl oz 4.16 fl oz butylka (vodochnaya)...