plastic prevents the pet from licking or chewing wounds or bandages with hook and loop fastener for quick and exact fitting hemmed edges make it comfortable to wear and protect furniture and walls from being damaged cm information shows neck circumference/collar length transparent 19510, Size: XS, Measurements: 18–23 cm/8 cm, Neck circum.: 18–23 cm 19511 Size: XS-S, Measurements: 20–26 cm/11 cm, Neck circum.: 20–26 cm 19512, Size: S, Measurements: 25–32 cm/12 cm, Neck circum.: 25–32 cm 19513, Size: S-M, Measurements: 30–37 cm/14 cm, Neck circum.: 30-37cm 19515, Size: L, Measurements: 44–53 cm/28 cm, Neck circum.: 44–53 cm