Each book shelf size is 15.7" x 11.8" x 11.8" (40 x 30 x 30cm). Our bookshelf more larger than other normal bookcase size(11.8" x 11.8" x 11.8") and can accommodate more items.Each book case holds up to 33Lbs which is more greater than the 10-15lbs load-bearing capacity of conventional cube organizer.4 x 13mm metal pipes and wider plastic connectors are used at each cube shelf to greatly increase the bearing force and stability and ensure that the bookshelf will not be separated and broken during use. The overall structure is firm, light and easy to move.The cube storage organizer can provide large storage capacity and various sorting compartments, for organizing books, magazines, toys, towels, clothes, underwear, socks and other sundries, perfect for bedroom living room and other spaces. It creates storage and display space for any area in the home. Placement flexibility as vertical or horizontal. The vertical space is fully utilized, increasing the possibility of more storage.