Karen Foster Snap Stamps Mini Casual 20 Numbers Interlocking Stamps Karen Foster Snap-Stamp Sets are an innovative way to stamp in a STRAIGHT LINE! Snap the interlocking numbers together to create dates or numbers, then press them into an ink pad or acrylic paint to stamp words on your projects. Quick and Easy! 20 piece Set; 2 of each number (0-9). Mini Numbers are 1/8" tall.