Size dimensions : 27cm x 20cm x 8cm (lxwxh) Product feature: Featuring adjustable belts, strong construction, and a rectangle shape for stability The Safety Swim Bubble provides balance and assistance for beginner swimmers,Lightweight and portable, it’s perfect for enhancing swimming skills and confidence. Note: There might be an error of 1-3 cm due to manual measurement, and slight color differences may occur as a result of varying lighting and monitor effects.