Wet The Stamp Scrubber before use. It will expand when wet. Fits comfortably in your hand. Use to remove ink from stamps. The scrubbers unique texture will clean even the most intricate stamp. Clean new red rubber or photopolymer stamps with The Stamp Scrubber to remove manufacturing residue and prime for stamping. The Stamp Scrubber is also ideal for cleaning stamp positioning tools and acrylic blocks. After use, simply rinse The Stamp Scrubber to remove ink, use mild soap or a stamp cleaner if needed. Allow to air dry. Size. Dry approximately 4x4inch. Wet approximately 5x5inch.