◊ The phrase one size fits all describes a hat, piece of clothing, etc., that is made in a size that is supposed to fit everyone. This phrase is commonly used figuratively.人人能穿（戴）的；适合每个人的（这个短语常用作比喻）
The school recognizes that a one size fits all approach won't work for these children. [=these children need to be taught in a way that considers the needs and abilities of each child]学校意识到，对这些儿童采用一视同仁的教学法是行不通的。