Description: Approved Safety Standards kids horse riding helmet. Tough PVC outer shell,fully ventilated with ventilation holes around the edge and at the top. Adjustable Size, use of a small dial at the back of the helmet can be tightened or loosened as needed; Soft and comfortable to wear. Has an adjustable chin strap which is easy to put on and to remove and the hat is fully padded and lined on the inside. Suitable for head circumference 48-54cm This product has got SEI Certification. Specification: Material: PVC + EPS Dimension: approx. 27 x 19 x 11cm / 10.6 x 7.5 x 4.3inch Size: Adjustable Suitable for head circumference 48-54cm / 18.9 - 21.3inch Package Includes: 1 Piece Kids Horse Riding Helmet