This reminds me of my mail-sorting rack. It's a standing rack for 45 rpm single records. I thought it would be perfect for sorting correspondence. It holds 30 records, or pieces of mail, in the top rack, 30 in the bottom, and occupies minimal floor space, about 8" by 20". But I could never find a place for it where it wasn't in the way, and apparently I'm just not the type of person who sorts their mail, except for putting it in large sliding piles in various places around the house.