Tough By Nature Hol-ee Rollers are high-quality rubber balls formed into a soft lattice-like structure that’s great to chew and grab. Insert treats inside to encourage play. Enough to make dogs bark praises and woof "Amen," the Hol-EE Roller dog toy is exactly what they want for exciting playtime fun. High-quality rubber ball is covered with holes, forming a soft lattice-like texture that’s great to chew and grab. Vanilla-infused rubber ball offers great bounce, long-life durability, and can be used with or without treats inside. Colors may vary. Small light green is 3 1/2".