Regulations for Managing the Labeling and Marks of Organic Agricultural Products and In-conversion Agricultural Products Article 8

The dimensions of organic mark may be duly adjusted based on the sizes of the products, the dimensions of their packaging or containers and shall not be smaller than 1.7 cm in diameter. In case of a restriction in packaging or containers as agreed upon by the certification body, nevertheless, the dimensions are free of the restriction of 1.7 cm diameter minimum.
中文原文 有機農產品有機轉型期農產品標示及標章管理辦法第8條
有機農產品標章得依產品、包裝或容器表面積之大小按比例調整尺寸,其直徑不得小於一點七公分。
但因包裝或容器之限制,經驗證機構同意者,不受直徑最小一點七公分之限制。

English translation for reference only; the Chinese text prevails. Not legal advice.