Scalloped frame

Here is another simple way to create a scalloped edge:

- With the Ellipse Tool, draw a small black circle with no stroke (the size you want the edge to be)

- Drag the circle into your Brushes panel

- A window will pop up, asking you to select a brush type; select "New Scatter Brush"

- A new window will pop up with scatter brush options; leave all of the default options which will look like this:

- Click "OK"

- Create a black shape with no stroke (such as a rectangle, circle or oval) to which you want to add the scalloped edge; while the shape is selected, click your new brush in the Brushes panel; this will apply the edge to your shape

- If needed, you can resize the shape to make the scallops line up just right; the result should look like this:

- To resize and recolor your new shape while maintaining the edge and shape proportions, you can go to the Object menu and select "Expand Appearance."  From there, chose the "Unite" option in the Pathfinder panel

I hope this is useful!