Here's a breakdown:
* Oblong: This describes the shape of the page – longer than it is wide, like a rectangle.
* Quarto: This indicates the page has been folded twice to create a book.
In more technical terms, an oblong quarto book has a format ratio where the length is more than twice the width. This is different from a standard quarto format, where the length is typically 1.5 to 2 times the width.
Example: A book measuring 10 inches by 5 inches would be considered oblong quarto.
Here are some other things to know:
* Oblong quarto is a less common format compared to other book sizes.
* This format is often used for art books, photo albums, and books with large images that need to be displayed prominently.
* It can also be used for books with a unique design or layout, where the elongated shape emphasizes a specific aspect of the content.
If you're looking for a book in this format, it's best to specify "oblong quarto" in your search to ensure you find the right size.