Rockin' Pens Acrylic Paint Markers are the perfect tools for decorating rocks and more! They're suitable for use on stones, pebbles, paper, fabric, wood, ceramic, plastic, glass and much more, giving you richly pigmented colour.The tips are medium size at 3-4mm. The ink is non-toxic, waterproof and UV-protected, and it will allow you to draw and write patterns, messages and more onto your surfaces. This is a great way to enjoy outdoor fun with rock decorating, and so much more! Pack size: 15 x 14.5 x 2cm (5.9 x 5.7 x 0.8 inches)Tip size: 3-4mmEight packNon-toxic, waterproof, UV-protectedSuitable for use on stones, pebbles, paper, fabric, wood, ceramic, plastic, glass and moreRockin' Pens Acrylic Paint Markers 8 Pack