Rosettes are a great way to mount things together that should have their orientation be changed quickly and easily.

Unfortunately (like it is quite common in cinema technology) every manufacturer has established his own Rosette standard meaning that parts from different manufacturers don't fit together.

This page tries to assemble the essential specifications of all the different Rosette Systems:

ARRI Rosette

60 Tooth Rosette with M6 internal thread.

Outer Diameter: 31.8mm

Red Rosette

Outer Diameter: 28.8 mm ? (needs verification)

1/4"-20 internal thread (needs verification)

Aaton Rosette

Moviecam Rosette

28mm outer diameter

42 teeth

3/8" diameter mounting screw

Sony Rosette

Arri standard teeth, but with 1/4"-20 internal thread

Links

Rosette Supplier: http://www.ganter-griff.de/?cmd=normblatt&guid=b9185656-6e4c-4af0-b441-cae8619bb50a&LCID=1031&pageID=produkte

Red to Arri Standard Rosette Adapter: http://woodencamera.com/Rosette-Adapter.html

Sony handgrip rosette to Arri standard Rosette Adapter: https://www.zgc.com/webstore.nsf/p/arri-337414.html