Tiered flower shape ( 2 sizes0 steel thin dies for hand roller mill style die cut machines such as Spellbinders, Sizzix, etc.
 The tiered shapes are perfect for creating many options of designs.  
simple designs eliminate the breakage that happens with more complex designs.
Size ranges from 4 3/4 " and 2 1/2 ", these will shrink to half the size.
 
Here is a link to successfully using the die cuts in a Sizzix machine.
https://vimeo.com/737292992