According to the regulations of the French eco-label, the minimum size should be 30x30 mm. This regulation is to ensure the clear visibility and readability of the label information so that consumers can accurately understand the environmental information of the product. The label usually includes the environmental rating, material and ingredient information of the product to provide consumers with more choices and comparison basis. Therefore, the size standard is stipulated to protect the rights and interests of consumers and improve the transparency and sustainability of products.