1.3-4.5mm line width. Large felt pen in vibrant colours with conical nib. Easy to hold for young children. Good nib resistance. Water based ink is washable from most clothes. Does not dry out, even uncapped during several weeks (except black ink). Age 3+. Washable pens are water-based and ink may wash out of clothes. Water soluble pens mean that the ink is water-resistant after drying and will not wash out easily.