Any form of Waffen-SS Insignia that either indicate rank, division or units. It came in various form, such as Collar Tabs, (shoulder) Patches, Reichsadler or Totenkopf Hat Ornament, Cuff Title and Shoulder Boards. Red Armbands and Nazi Party Pins are optional.
The most recognizable ones are the two Sieg runes and heraldic shield bearing specific symbol of certain division, such as crossed stick grenades of the Dirlewanger Brigade (post #6434101).