The parameters of the first layer (the circle)
The parameters of the second layer (the lowest highlight)
The parameters of the third layer (the upper highlight)
In the next copy must be changed also the parameters.
The parameters of the first layer (the circle)
The parameters of the second layer (the lowest highlight) – of white color.
The parameters of the third layer (the upper highlight) – of white color
Apply now the shown instrument
and try to picture a figure with shown sizes next step.
Blending Options-Gradient Overlay
Gradient's parameters.
Blending Options-Stroke
Applying the last instrument, insert a figure of white color in our picture.
Merge down now all the layers containing this
in a group.
Copy this new made group 4 times and apply Free Transform selection to minimize it or increase it if it's necessary.
Turn it around now on 180 degrees horizontally.
If it's necessary, you may apply this instrument
to make the appropriate corrections. Place everything out like it is shown next picture.
The final result!
More Tutorials: 
