Product Name: Aerial Yoga Rings The hanging rings are non-standard products and are not eligible for return or exchange once sold. Thank you for supporting our global shipping service; postage is calculated separately Material: Stainless steel Dimensions: The diameter of the rings is 80cm, 85cm, 90cm, 95cm, 100cm; Tube thickness: 2.5cm, there is also a 3.2cm option. If needed, please contact customer service. Features: Single-ear design with double ears, no ear loops, please contact customer service if needed When purchasing anti-slip tape or yoga wristbands, you need to note the color or contact customer service to make a note.