First and foremost: design specifications show this bookcase as 35 and 5/8 in wide. Once I received it I measured the inside shelves and they are 36 and 1/2 in wide. Those are the inside shelves! Also, these inside shelves are paper thin! The 2 bookshelves arrived about 3 weeks apart. And Since it would cost more in return shipping than these are worth I now have to CUT all the shelves down by 2 inches to retrofit them to what the specifications were. I have yet to build one as I'm still waiting for the 2nd to arrive. Definitely not worth the money! 
Update: 2nd shelf arrived and once my husband saw how thin and flimsy the shelves were he wouldn't even touch it. Return shipping is half the cost of the product and I'm stuck with them. Complete garbage, don't waste your time or money. Specs aren't even right!