What is the size of the book cover?

could you please give more details about the book?
thank you.

yes, the book cover should be 5x8. Thanks!

yes, the book cover should be 5x8. In the book, I'm telling people how to use the Roth IRA to save taxes for not only themselves, but for their surviving spouses AND heirs too.
If that makes sense.

I'm guessing 5x8 is just the front cover, how big of a spine will there be?

not sure the answer to that question. 5x8 is the cover. yes. Is there a typical spine size?

The spine size is solely dependent on how thick the book is.

100 pages. Does that mean anything?