The spine of the album is about 2 7/8 inches wide. I had empty pages on hand to experiment with filling it to 150, and could have added a few more. It will depend on how you finish your book. For example, if you are scrapbooking 150 pages, using card stock or scrapbooking paper, and with the recipes on cards as well, you may find the added bulk won't work. If you have 150 recipes, however, and are using the divided pages where you can insert two cards on each side, without adding extra paper, cardstock or embellishments, you'd only need 38 pages, adding more pages for recipes where you want to read both sides of a card without removing it from the album. Hope that helps! These are great little albums!