Per KPRA Rulebook, page 32, WOMEN'S BREAKAWAY ROPING, #1:
1. Ropes are tied to saddle horn with nylon string provided and inspected by the judges. Flag must be 4 inches wide and 12 inches long, visible by flagman or judge, and must be attached to end of the rope, with no long tails.
Per KPRA Judge Rep:
It is suggested that the "flags" on the end of the ropes be a plain and lighter color for easier visibility. Flags with designs, prints, and darker colors are much harder to see, especially in an evening performance. Thank you.