Zisc Glow is designed for interactive and supervised play. More pliable than a hard-shell frisbee and more durable than those made from fabric, Glow Zisc is a perfect pick for trips to the park, yard, water and night time play. Flexible material makes this dog frisbee gentle on soft mouths and easy to pick up. In the world of frisbee-style dog toys, Zisc flies to the top. Large measures 8.5" and mini measures 6.5".