This is the "Elizabeth Collar for Dogs, Soft Mesh, Lightweight, Breathable, Medium-Sized Dogs, Prevents Licking, XL 47cm-53cm, Adjustable." It is used to protect the affected area and supports a smooth recovery without stress. It has a cushion that gently wraps the face, and can be finely adjusted with Velcro. The mesh processing uses breathable material, so your dog will be comfortable. Color: Outer Blue, Inner Green Size: XL Neck circumference: Approximately 47cm to approximately 53cm For medium to large dogs *Please refer to the reference images for details. Also, please understand that there may be slight variations.