From the manufacturer:
Ignite imaginations with these foam sheets. Cut out shapes and designs. Perfect for arts and crafts at home or school. This 12.2x1x18.3 inch package contains twelve sheets of 12x18 inch foam sheets in assorted colors. CAUTION: NOT A TOY. Not intended for children under 15 years. This product is intended for adult fashion and decorative uses only. Do not put items in mouth or ingest.