Double the tuff. Double the fun! The Double-Tuff is available in purple,orange, or steel. It comes in 3 sizes: Small = 3" high, Medium = 4" high, Large = 5" high. It is rated at 5 out of 5 chompers on our Durability Scale, making it suitable for most dogs. 100% GUARANTEED. Any time. Every time. Made in the USA.