Features:Safe double airbag, wear-resistant and practical; Specifications:Material: PVCSize:neck ring inner diameter 9cm / 3.5in, outer diameter 39cm / 15.4inRecommended age: 0 - 18 monthsSuitable for scene: recreation equipment, swimming and related sportsColor: pink, orange, blue, greenNotes:1. Patterns may be random due to different batches of production.2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!3. Please allow 1-3cm measuring deviation due to manual measurement.