These fit on most heads, please try
before you buy.
Or you could find much better ones
here
Developers: Studs, slightly bigger as usual, to add that detail.
For the diamond just use a 64x64 texture.
The template for the rim can be found
here, i recommend you re-size it
to 64x64 after editing for best performance
Want to buy a textured version of this product? here are some derivations of it: