@McGentrix,
No, they are less than the old corner stores, and supermarkets were so called for being able to carry more goods than those. Given the time, that was true.
I remember a contretemp I had with the local corner store owner. I was, say, ten. We kids went there primarily to get popsicles in summer. Our parents went to IGA, not that much bigger. One day, I didn't have enough money, and said so. It was why I wasn't buying, among the five of us. The store owner sniped at me that I was a rich kid, it was shown on the church donation bulletin.
Huh? For some of our years there and then later our small family was in big doo doo.
Turned out to be a church donator with a similar name.. that caused him to not like a kid. All in all a nosybody, as an old friend would say.