I prefer the softer look so I use a very light fusible with 2 cotton fabrics. I made one using slightly heavier fabric and did not use any interfacing. This one is being used as an easter 'basket' so it has plastic easter eggs stuffed in each petal. When being stored, I stuff a small bit of tissue in each petal. I love having things poke out of the petals. My halloween one has little mummies and ghosts, my St.Patty's day one has gold coins and leprechauns. I have also varied the sizes from 4" finished squares to 6 1/2" finished. The 4" has the center almost meeting and the larger is perfect for setting a bowl or plant in the middle.