Standard inserted imaged looks like this:
and with this line of code, you can create any of these formats by changing the radius % value
Lets look at the line of code:
<img alt="" src="http://location/imagefilename.png" style="width: 220px; height: 208px;border-radius: 50%;" />
In your report layout click the 'Source' button located top left of editor and add the highlighted line of code to your <img> line and change the percentage to desired look.
Frames may also be added in the same way by changing the border px value (Value 3 shown in example) style="border: 3px solid gold; height: 169px; width: 200px;" /></p>
Image size is controlled by height and width values.