Tall shelving and wide shleves, thin bookcases and narrow shelving, or perhaps long and deep shelving?
5 shelf Polypropylene Shelving unit (H)1820mm (W)800mm | DIY at B&Q
2 Tier Shallow Shelving Unit Spice Rack Wooden Decorative Trinket Display | Large 55 x 5 x 37 cm | Compartment Collectors Storage Tray | Unpainted & Unfinished Plain Pine for Craft