Terms for subject Mathematics containing by sizes

English	Russian
by size	по размеру (separation of particles by size)
by size	по размерам
by sizes	по размерам
distribution by age and size	распределение по возрастам и размерам
in the early 1960s the size and types of problems were limited both by the capacity of early computers and by the lack of algorithm technology for their solving	ограничивались отсутствием алгоритмов их решения
separation of particles by size	разделение частиц по размерам
the material can be brought to size and shape by conventional methods	доводить до заданных размера и формы