如果是地名-地方出产的话:Made in China; Made in Chicago. 最好用made in。
如果你是指由某个人制作的,就用:Made by somebody。
举个例子:This beautiful bow was made by Elaine. 这个漂亮的蝴蝶结是伊莲做的。
楼主是对的,一楼的反了,意思是为某人制作
最好用 designed and made by sb. 过都是他完成的话
如果是音乐的话 直接 music by sb
剪辑的话 editing by sb
如果整个都是你制作的话
直接 all by sb
This product is made by someone (XX).
对的。