How big is this store? (Compare it to other stores) is it Costco size IKEA size etc.

It's big but not as Cotsco

It's big but not Costco or Ikea size

It's pretty big but not as big as Costco

Its like a small Costco

If you've been to the Staten Island Mall before, Primark replaced the 2nd floor level of the Sears wing, so it's pretty big.

As big as a really large h&m

Smaller than Costco or IKEA. Bigger than a VS though