All of them are set up as pauldrons.
There are 2 ESP files:
-KDCirclets.ESP - adds circlets to leveled lists. Also the circlets can be bought from a pawnbroker in Balmora and from the trader in Mornhold (he sells more ornate and expensive circlets).
-KDCirclets_Resource.ESP - only adds them into CS as resourse.
Requirements:
MGE XE
MCP with enabled bump mapping
If you use the version which modifies leveled lists, don't forget to use a leveled list merger as well.
Known issues:
Clipping with some heads is possible