I saw this felt dahlia flower in blogland the other day and couldn't wait to make it..... if you want to give it a go, you can find the tutorial
here with exact measurements.
Now my version isn't as lovely as the tutorial, but its not bad for a first attempt even if I say so myself. I did use a hot glue gun because it is much quicker and I don't have the patience to sit through waiting for normal fabric glue to dry!!! Me thinks loads of people I know will be getting brooches as pressies this year!!!!
This is what I started off with.

With a little bit of hot glue, I glued the ends of the cut felt together.

Like so to form the petals.

Then I glued a piece of cardboard (measurements in original tutorial link at start of post) with the felt.

And folded over the back of the felt. Don't worry about the messy look.

Because I will cover it with another piece of felt.

Now starting with the largest petals, I hot glued them to the base close together.

This is how it looked with one layer finished.

Then I added the second layer of petals (the mid sized ones)

And finally the smallest petals at the end. The middle wasn't very clean.

So I made a rosette out of a strip of felt and glued it to the centre.

Ta da - you could use it as a brooch or on a hairband or maybe even on a necklace!
I am waiting for my pin backs to arrive so I can use it as a brooch on my jacket!!!!