Reusable! Demonstrate sentence building, writing, grammar and punctuation or even math equations on your magnetic whiteboard. Pass them out and have the students bring them up when they´re complete. Each strip measures 24"L x 3"H. Ruling measures 1.5"H and 0.75"H. Ages 5+/Grades K+. Each pack includes 10 strips. Sold as 2 packs for a total of 20 strips.