Solid rings are shipped with an average of 3-7 colors by default. If you need a specific color or a single color, please contact customer service and make a note. Hollow rings come in 3 colors: red, yellow, and green. They are shipped with a random color after purchase.Hollow rings are specially designed for street vendors, suitable for holding porcelain, dolls, and pets. The advantage is that they can be easily adjusted in size. If they are too large, they can be cut short and reattached. Similarly, if you need a diameter of 12 cm, 14 cm, or 16 cm, it is difficult to reattach them, especially the smaller sizes. It is easier to buy larger ones and cut them yourself. Generally, one 25 cm ring can be turned into two 12 cm rings. Shipping is based on the warehouse's selection and will be sent with well-connected circles or directly with tubes and connectors. You will need to connect them yourself when you get them. The shipping method will depend on the situation. I wish all of you good business.