Created for a St Patrick's hat. Modified and extruded from an SVG:https://www.svgimages.com/tags/clover/1.html
About 69*85mm and 5mm thick. The stem is a bit thinner.
I printed in Slic3r with Concentric top/bottom to add a more natural effect... sort of...
Don't forget to print the top concentric, it gives a really cool effect !