As their name suggests, they're a bigger than average, in bright colours so dead easy to see, and soft and very safe - stand on them and they'll squish.
Giant Safety Markers are large high-visibility marker cones with notches at three different heights - useful as hurdle pole support cones as well as markers for footwork and other training drills. Notch on the top will hold a tennis ball-sized ball, which is great for pick-up exercises.
Buy a set of 24 here, with a carry pole included. Six of each colour - fluorescent yellow, bright red, bright blue and green. Also available in sets of 12.