It's pretty big. I put everything into duffel bags before loading it up, because it makes loading & unloading so much easier. I've fit 6 very large duffel bags in there with no problems. I think the instructions recommend only putting soft-sided bags in it, but I've put strollers and other things like that in there before.

I got it at Sears; you could probably go to a Sears store and take a look at one to see what fits, if they have them currently in stock.