The span width of 2 10X285mm is 420X285mm. The book in the middle is counted by yourself, and the front cover and back cover are added by yourself.

See what software you use to make it. Generally, it is printed as a pdf file with Adobe Illustrator.

But with Adobe InDesign, this text is super much. If there are many pictures, use a software, and finally export a pdf file for printing.

You'd better find an English book and measure it yourself with a ruler.

Beijing Professional Printing Factory (the earliest, opened 13 years) can call me at Beijing Printing Factory. I can send private messages.