This product includes 15 binder covers with matching spines. The 15 covers include Math, Science, Social Studies, Reading, Writing, Basal Stories, Sight Words, Fluency, DOL, A.R., Grammar, Phonics, Guided Reading, Science/Social Studies, and Lesson Plans. Each subject comes in all four colors so that you can choose the colors you want. The four colors are pink, green, purple and blue. I am more than willing to customize covers for you if you would like to add different words. The spines fit binders at are 1.5 inches.