Material: Silicone
Specifications: Unit: cm (tile measurement error of about 2cm)
Small: for mouth circumference 10.5cm， neck circumference 12-30cm， mouth sleeve height 4.5cm， weight 55 grams
Medium: for the mouth around 15.5cm， neck circumference 14-34cm， mouth sets of height 6cm， weight 83 grams
Large: for the mouth around 16.5cm， neck circumference 17-40cm， mouth sleeve height of 7.5cm， weight 140 grams