Collar-tabs of an SS officer (SS-Oberst-Gruppenführer — the highest military rank in the SS, except the rank of Reichsfuhrer-SS, which had only Heinrich Himmler). On both tabs is 3 oak leaves and 3 stars (pips) embroided with metal thread. Edge piping is made of a twisted silver-black cord.
How to sew collar tabs on? Put a collar tab on the collar of the service jacket so that it is not less than 5 mm from the edge. Fix it with a bright thread (which then remove) or glue. When collar tabs sit properly, they need to be sewn with a black thread by the edge.