4" x 2.5". These archival quality inks evoke the fine art palette of Chalk Pastels. These inks share the resilience of pigment ink but stamp and blend like dry ink, drying quickly on absorbent surfaces. Permanent when heat set, they resist smearing, bleeding or fading even when air dried. Inkpads use a special foam pad that allows you to select the inking intensity desired for stamping, Direct-to-paper and many other backgrounding techniques. Use these inkpads with any size stamp. Safe, water-based formula will not dry out or leak.