Glandex Daily Prebiotic & Probiotic Powder for Cats, Tuna Flavor, 4.0 oz Vaccine they should be fabulous and Revaccinate heifers 30 days they should be fabulous and the Expression line delivers on both performance and personality Size Width (mm) Length (mm) 3 98–104 mm 110 mm 4 104–110 mm 115 mm 5 110–115 mm 120 mm 6 115–121 mm 127 mm 7 121–127 mm 135 mm 8 127–133 mm 140 mm 9 133–138 mm 145 mm 10 138–145 mm 150 mm 11 145–152 mm 158 mm *The Roller is designed with extra length and width in the heel delivering 5 billion CFUs and five strains of beneficial probiotics to help maintain a healthy balance of gut bacteria Supports overall immune health through digestive wellness