345 Reinsman Junior Cowhorse Sweet Iron Small Chain Mouth with Copper Pacifiers 5 InchSweet Iron Small Chain Mouth with Copper Pacifiers. 5 Inch Cheeks. 5 Inch Mouth. Stage B. This bit has light control and is excellent for training or relaxed pleasure riding. The small chain mouth conforms well to the bars and tongue making it comfortable for your horse to pack. Because the chain conforms to the shape of the horse's mouth the horse can move the links around on his tongue to place the bit in a more comfortable location which leads to a