I usually wear a size M from this brand, and I bought this hoping to size down, but unfortunately, it didn't fit, so I'm selling it new. The size is 52-54cm. ※Please understand that this is an imported product. ※Although it has a new tag, as shown in the last photo, the outer bag has some scratches from the beginning. ------------------------------------------- Made of high-quality materials, it has very high impact resistance. It features a matte outer shell, and the air vents are adorned with rhinestones in the Equestro logo. This detail and the glossy frame give the Equestro product its elegant and sophisticated appearance. The front air vents provide excellent air circulation. The helmet is equipped with an adjustment system at the rear. This system needs to be adjusted to minimize helmet movement and ensure maximum protection. The comfortable and breathable inner padding is removable and easy to maintain. Stylish black helmet with Swarovski-style stones. - Color: Black - Decoration: Swarovski-style stones - Model name: Equestro Proximit Thank you for viewing.