What is the Best Depth for Wire Shelves

What is the best depth for wire shelves?

 

The depth of best wire shelves for household use should not be too deep, The highest shelf should be shallower,. and the depth of commercial wire shelves is generally 18-24 inches,  The number of layers of commercial shelves is higher, so the size that is too deep will affect the storage and retrieval of high-level items.