Acrylic Paint Markers work on almost any surface! 12 vibrant colors! Fine 0.7mm bullet tips. Opaque paint markers. Paint and write nearly anywhere -- on paper, glass, stone, plastic, ceramic, wood, and more! Great for crafts. Fast-drying. Water-resistant once completely dry. TO START PAINT FLOW: Gently shake marker. Uncap. Press tip down against a surface until paint flows to tip, then draw. Recap marker right away when finished. Each marker measures 5-1/4'' in length. Acrylic Paint Marker Set comes in a sturdy plastic storage case. Reusable storage case allows you to take your paint markers on the go! Case measures 6'' square.