BDStyle Collar Adjustable White Collar Width 50mm Length 40cm (15.7) There is nothing simple about the quality and craftmanship of this BDStyle lust collar. This piece is one that easily matches your existing pieces. Tone down the accessories and ramp up the tricks. Matching wrist and ankle lust cuffs, paddles, whips and more to complement this collar. Please note: We have two grades of PVC Material and they are –Beginners/Soft Bondage: This PVC is light weight and designed for soft bondage play. It feels light to wear but is not suitable for hardcore/heavy bondage. The average thickness of the PVC Material is 2mm Hardcore/Heavy Bondage: This PVC is thicker and stronger and designed for more experienced or hardcore bondage users. It is heavier to wear and more robust. The average thickness of the PVC Material is 2.5mmChoose the grade that is most appropriate to your use.