4x4 wooden squares

64.38" Kowski 5 Layer Bookcase - miBasics

Coaster,Owens 96-inch 6-shelf Wall Bookshelf

HomeRoots 71" Brown Steel and Wood Four Tier Etagere Bookcase with Two Doors

42.75" Town Square Chrome 4 Tier Bookcase Chrome - Breighton Home

MAYEERTY Decorative Bookshelf with 2 Drawers, Tall Narrow 4-Tier Open Bookcase, Wooden Storage Cabinet for Bedroom, Living Room, Home Office

Kings Brand Furniture Nathan 3-Piece Bookcase Set with 3-Tier, 4-Tier & 5-Tier Shelves, Modern Oak/Black Wooden Display & Storage Organizer

60 Inch Tall 5 Shelf Cherry Wood Bookshelf with 4 Adjustable Shelves, Sturdy Bookcase for Bedroom and Office

Martin Furniture 76" Carson Open Bookcase Brown: Wood Frame, 4 Shelf Storage, No Assembly Required

Mack Rustic Bookcase Light Copper - HOMES: Inside + Out

miBasics 75.39" Ossi Industrial Display Tower Cement: 4-Shelf Farmhouse Style, MDF & Particle Board Construction

62.5" Myroe 4 Layer Bookcase Matte Black - miBasics: Industrial Style, Steel Frame, Open Shelving

72.25" Havano 4 Shelf Open Industrial Bookcase: Steel Frame, MDF - HOMES: Inside + Out

71.9" Nathan James Set of 4 Jasper Wood Fluted Bookshelf Brown

HomeRoots 56" Black And Brown Metal and Wood Four Tier Etagere Bookcase

Storied Home Saratoga Rustic Solid Wood and Metal 4 Shelf Open Storage Bookshelf, Warm Walnut Finish

50.63" Kurry 4 Shelves Bookcase Sand Black - miBasics: Transitional, Tapering Profile, 5mm Glass

Dovelina Wood Decorative Bookshelf Bookcase with Glass Doors and Adjustable Partitions (Set of 4) - 62"x62", Natural Wood

HomeStock 71 "H. Black Manufactured wood Book Racks 4 with Tier Shelves

HOMES: Inside + Out 70.86" Humbolt Ladder Display Shelf Vintage Gray Oak: Industrial Style, 4-Tier Storage

Coaster,Loomis 72-inch 4-shelf Bookshelf Whitewashed Grey

Crestview Collection 67 in. White Solid Wood 4 Shelf Etagere