The dry erase surface makes these sentence strips convenient and reusable. Teachers can use them again and again. Ruled 1-1/2″ with red baseline and 3/4″ dotted midline on dry erase side. Dry erase surface on one side. Measures 3″ x 12″. Each pack contains 30 white strips. Sold as 6 packs for a total of 180 sentence strips.