1. First, the earring labels should include material information. This can help customers understand the quality and durability of the earrings. For example, if the earrings are made of 925 sterling silver, the label should clearly state "925 sterling silver".

2. Secondly, the label should include brand and designer information. This can help build brand awareness and let customers know the origin and design background of the earrings. For example, the brand name and designer's name can be written on the label.

3. Finally, the label should also include instructions for use and care. This can help customers wear and maintain the earrings correctly and extend their service life. The label can remind customers to avoid contact with chemicals and water to avoid damaging the earrings. It can also explain how to clean the earrings and storage methods. This information allows customers to better protect the earrings they purchase.