Fitment: This kids bicycle saddle is universal for children's tricycles and bikes with wheels up to 18 inches Premium Material: Made of high-quality PU leather and steel, this kids bike seat is waterproof, wear-resistant, and sturdy for long-lasting use Easy Installation: Designed for quick and simple installation, compatible with seat posts with a diameter of 2.0 cm to 2.2 cm (0.79 inch to 0.87 inch) Comfortable to Use: Thickened design with breathable surface, easy to clean, providing a comfortable riding experience for children Wide Applications: Suitable for both boys' and girls' bicycles, offering reliable durability and performance Specification: Material: PU leather, steel Dimensions: 15 cm x 21.5 cm (5.91 inch x 8.46 inch) Package Includes: 1 x Kids Bicycle Saddle Note: Slight measurement variations may occur due to manual measurement and screen display differences