Full Decorative Shelf Brackets Measurements & Color Selection: The Antique White Shelf Brackets measure 14.5 x 1. 96 x 14.5 Inches. These large shelving brackets are perfect for any job that requires a heavy duty shelf bracket. Heavy Duty Shelf Brackets Manufactured with weighted cast iron, these rustic shelf brackets for wood shelves are made to last. These floating shelf brackets will not bend or break, unlike some standard L brackets. Keep your wall shelves up and level for years to come! Multipurpose Decorative Shelf Brackets: Whether you need a heavy duty floating shelf bracket, mailbox mounting bracket, or countertop brackets, these metal shelf brackets are made to suit your needs.