“Arshin swallowed” – how do you understand where this word combination came from?

This phrase likely comes from a folk tale or nursery rhyme. Arshin is a Russian unit of length, equal to 28 inches, which is traditionally used to measure fabrics. In the folk tale, a character named Arshin swallows something, likely a fabric or other item, in one gulp. This phrase is likely used in the context of someone being able to do something quickly or easily.