These were made with nothing but straws that I split from the middle to form a simplified "stamp" to push impressions into clay. The rough lines you see in two were created with toothpicks as a test to see how that fares. How much the scales intersect depends on how large you make the notch in the other side of the straw's tip. Can be done with any sized straw and used with other stamp materials depending on how you combine them. Simple and fun.