Note: Please allow 1?3cm error due to manual measurement. Thanks for your understanding. specification: Item Type: Heated Beanie Hat_x000D_Material: Coating_x000D_Size: Approx. 26 x 23.5cm / 10.2 x 9.3in (With elastic) Features: 1Easy To Use: Just plug into USB power port to use and the USB cable can also be removed use without electric heating. 2Elastic: No matter your head size or hairstyle, this elastic USB heated knited hat will stretch to fit you and can even cover your ears. 3Dual Use: USB Heated beanie hat has drawstring design, which can serve as not only a hat, but also a scarf to keep your neck warm. 4Keep Warm: Electric heated hat adopted heating elements can be distributed around your neck or head to keep them warm and cozy. 5Easy Match: Unique drawstring opening design makes this hat is also great for ponytail and easy to pair with sweater, jacket for a stylish look. PackageList: 1 x Scarf 1 x USB Cable