In this  shot, we see the inaugural Zayre store, which opened, in Hyannis, Massachusetts, in June 1956. Upon its grand opening, the store measured only 5,000 square feet.
Photo from

Here we see a Zayre store in Addison, Illinois. Obviously, by the time this location was built, the size of stores had been expanded around 80,000 square feet.
Photo from Wikipedia / Joe Archie

A typical Ames location, which had been shuttered by the time this photo was taken. Stores originally opened as Ames encompassed between 41,000 and 50,000 square feet.
Photo from "Zayre88"