I apologize that you were missing hardware, that's definitely not how that's supposed to work. I know this was a month ago, but if you're still missing hardware, please give us a call at (877) 203-2917
Sorry for any confusion and that your question was not answered. The shelves inside are 14 3/8" deep, 14 3/8" from side to side, and combined are 19 1/4" high, but are adjustable. Hope that helps.
Thanks for your question! The two shelves in the middle, between the doors, are each 20 7/8" wide, 14 3/8" deep and combined are 19 1/4" high. Hope that answers your question. Let us know if you have any others.