1. Materials: The reflective collars are made of polypropylene, which is comfortable to wear, durable, and sturdy. 2. Adjustable and suitable for indoor and outdoor use: These collars can be adjusted between 19 cm and 32 cm (7.4 - 12.5 inches) and have a width of 0.4 inches (1 cm). They are suitable for most pets. You don't have to worry too much about your pet's weight changes. They are suitable for pets in a relatively wide weight range. 3. 12 colors: Each set contains 12 quickly detachable collars in 12 different colors, namely two shades of red, pink, yellow, fluorescent green, grass green, light green, royal blue, blue, purple, black, and orange. You can choose the color according to your preference. 4. This set of collars is designed for small pets, such as... etc. 5. A strong and safe breakaway buckle that is easy to open and... (The original text is missing information here). 6. Material: Polypropylene 7. Colors: Multi - color (red, red, pink, yellow, fluorescent green, grass green, light green, royal blue, blue, purple, black, orange) 8. Quantity: 12 pieces 9. Length: 19 cm - 32 cm 10. Width: 1 cm 11. Package contents: - 12 reflective collars (12 different colors) - Only the above package contents are included, and other items are not included. 12. Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product. The allowable measurement error is +/- 1 - 3 cm.