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: