a smaller paperback, the size you often find at the grocery store

the standard pocket novel sized paperback

Paperbacks widely distributed in outlets other than bookstores (supermarkets, newsstands, variety stores, and so on.) Format usually is "rack size" to fit pockets of wire racks designed for their display (4-3/16 by 6-7/8 inches).

small format paperback edition.

A smaller paperback, the size you often find at a supermarket.

also called "rack-sized", this is a paperback book smaller in trim size than trade paperback, usually with a different cover illustration than the hardcover edition, and considerably cheaper.

A system that allows a broad range of people to buy, sell and exchange goods and services. The mass market normally runs according to the theory of supply and demand. This theory says that in a stable market, the amount of goods or services for sale (the supply) will balance with the amount of goods and services people want to buy (the demand). See economies.

A very large general market or audience. Titles for the mass market are expected to sell in great quantities (press runs in the tens and hundreds of thousands) quickly.

(Requested to NOT redirect to Mass marketing; see )