It's about as big as a bookcase, actually. And the amount of seedlings and young plants you can start in there is pretty amazing, especially if you're rotating. In fact, the wife took out several tomato plants today and transplanted them outside. We spent all morning at the nursery and in the backyard putting in a new square-foot garden. Really nice.
Thank you for that update on the indoor greenhouse. Best of luck with your indoor gardening. I will check at the garden stores for more info, such as Lowes, as you recommend. Cheers!