Description: Wide neck mouth, Made of silicone, soft and comfortable. Fits the palate of infants while suckling. Similar shape with the mother's nipple, help the baby to stabilize mood, promote the movement of the brain. Sized and shaped for baby's mouth. Reduces the pressure of air inside the bottle. Size S for 0-3 Months Baby, Size M for 3-6 Months Baby; Size L for 6-12 Months Baby, Cross Hole: above 12 Months. Specification: Size: Approx. Dia: 5 cm / 1.96 inch Height: 4 cm / 1.57 inch Material: Silicone Package Includes: 1 Piece Silicone Baby Pacifiers Note: 1.Please allow 1~3 cm error due to manual measurement, thanks. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Please understand, thank you.