Check out these cheap deals for a Brass 510 Drip Tip with Wide Bore.
This mouthpiece is made from brass and is only available in copper color. It is made with high quality materials for durability and also easy to clean. Size-wise, it measures 1.57 x 1.57 x 0.98″ or 4 x 4 x 2.5 cm and weighs 30g. Looking at the reviews, previous buyers have stated its not too big and the drip tip does not get hot. A high quality mouthpiece!