When I looked at the info for this, it said it was 13.5" wide, I made the mistake of thinking that the storage was 13.5" wide and as my cookie sheets are 13" I thought it would be perfect since they don't fit in my built in cabinets. Upon opening them up, I see that the label states the storage is 12" wide. I was bummed at first, but my muffin tin and cooling racks fit in it just fine, so it worked out in the end. I have it hanging on a lower cabinet on the outside since my under the sink cabinets are too full to hang it on the inside.