Here is a storage shelf solution that is truly unique! Each shelf can hold 21 pint jars or 12 quart jars (with room for more half-pints around them). This listing is for one individual shelf with four upright pieces. Simply purchase your desired quantity and then stack them together – no fasteners needed. Each shelf measures 24 inches wide by 10 inches deep. The uprights are standard 10 inches tall between shelves. A one inch lip is formed up to keep items from falling off. Or assemble them with the shelf lips pointing down for a unique bookshelf. Also makes great modular storage in the garage, in closets, and in kitchen cupboards. This product is made from rigid, light-weight aluminum in the USA.