Choosing the perfect format size for a paperback book is an important decision that shouldn't be taken lightly. It can depend on several factors such as genre, length of the book, target audience, and more.
In general, a standard size for a paperback book is 6 x 9 inches or 5.5 x 8.5 inches. These sizes are popular because they are easy to handle and store, and they also tend to be cost-effective for printing and distribution. However, it's also worth noting that some readers may find these sizes too small, while others may prefer larger or smaller books.
For non-fiction books or textbooks, a larger format size is often preferred to allow for diagrams, graphs, or other visual aids to be included. In this case, a larger format such as 8.5 x 11 inches may be suitable. For children's books or picture books, larger format sizes are also recommended to accommodate larger illustrations and text.
It's also important to consider the thickness of the book when choosing a format size. A thicker book may benefit from a larger format size to avoid the book feeling too bulky or unwieldy. Conversely, a thinner book may be better suited to a smaller format size to avoid the book looking too sparse.
Lastly, it's always worth doing some research on what format sizes are popular in your genre or among your target audience. This can help you make an informed decision and ensure your book appeals to the readers you are trying to reach.
In summary, there is no one-size-fits-all answer when it comes to choosing a format size for a paperback book. Consider the genre, length, target audience, and thickness of the book when making your decision, and do some research on what format sizes are popular in your genre or among your target audience.