The shorter shanks on the Curb bit create a faster response with less leverage as compared to a longer shank curb. The Curb Bit shanks measure 5 cm long, and the mouthpiece 12 mm thick. The Bradoon has a slightly thicker 14 mm mouthpiece, and the Stainless Steel Rings measure 55 mm. As is the proper way to fit a double bit set, the Bradoon is slightly wider than the Curb Bit for the most comfortable combination.
The size of the bit is determined by the measurement between the rings on the Bradoon, and between the shanks on the Curb. The thickness is measured as the diameter of the mouthpiece at the connection to the ring or shank. The length of the shank is measured from the bottom of the mouthpiece, to the bottom of the shank (not including the rein ring).