Originally Posted by klswift

Check several. There are a couple ones out there that make it much more difficult to make than it needs to be. One thing to consider is some use a foam, sew all the way around the square, cut a slit, turn rightside out and then appliques over the slit. I do not do this and have made close to 100 of these in various sizes and styles (squares, banded, hexies, leaves and pumpkins). I use a heavyweight fusible, stitch around the square leaving a small opening, pull it rightside out and then topstitch. I will then do another stitch - either STID around the banding or maybe a squiggly stitch from one corner to the opposite and this will be at the bottom of the 'petal'.
If using very lightweight fabric or lighter fusible, when finished, I stick pieces of tubes (TO, paper towels, gift wrap tubes) in the petals and lightly spray with best press. This increases the oomph of the petals. The only tricky part is knowing the stitch line to put the petals together. On a 6" finished square I measure 3" down from one corner (both sides) and 1" up from the opposite corner (both sides). When you draw a mark from a 3" spot to a 1" spot you will see the angled line that you attach to the next petal letting the petals form a circle. Caution, make sure you attach the petals with the small corners together and not flipped around! Late at night this is a very easy mistake to make! After making a couple this size, you can try other sizes and style (hexies require a bit more thought and only use 10 petals instead of 12). But, they can be addictive and are a great way to use up lots of small leftover fabrics. It only takes 12 - 6 1/2" squares of 2 fabrics to make them. And, I cut my interfacing at 6" to eliminate a bit of bulk (the topstitching and quilting secures it for multiple washings and storage).