Theoretically the coptic binding method can hold an infinite number of contributions, but we think any more than 300 contributions would probably require creating 2 or more volumes. The biggest we’ve made so far was for a retiring college director. He collected 244 contributions which resulted in a book with 459 pages.
If we need to make 2 or more books this would fall into the “custom” Fondfolio category which is $359+ (depending on the customizations).