The size number represents the teethers style (see photos please)， please choose number before place your order， thanks!1 - Shark2 - Octopus 3 - Banana4 - Banana no Handle5 - Corn1. 100% Brand New.2. Material: Medical silicone (Without Bisphenol A)3. Ages:0-24 months4. Style: Shark， Octopus， Banana， Banana no Handle， Corn5. Disinfection methods: Boiled (recommended two minutes or less)6. Recommended by Pediatric Dentists7. Promotes healthy habits from the beginning8. Helps develop hand/eye/mouth coordination9. Massaging Bristles for teething relief10. Removes food and milk particles gently11. Engineered with stimulating textures12. Package Content:1 x Baby Teethers Toothbrush