As nouns the difference between sizes and sizer
is that sizes is plural of lang=en while sizer is alternative form of lang=en.
sizes
English
Noun
(head)
sizer
English
Noun
(
en noun)
An instrument or contrivance to size articles, or to determine their size by a standard, or to separate and distribute them according to size.
An instrument or tool for bringing anything to an exact size.