The utility model relates to a stepless adjusting collar, which is attached to a shell body and is provided with strips that can be stretched out from both ends of the shell or rolled back. After two strips are pulled out, they can be connected and fixed around the neck of the pet and used as collars. When not in use, the two strips can be rolled back to the shell body for hiding. The shell can also be connected with additional ornaments to make it more convenient to dress the pet. u3002一種無段式調整項圈，係在一殼體內設置可以從該殼體兩端拉伸出來或捲收回去的條帶，兩條帶拉出後可以圍繞於寵物頸部後再將兩條帶彼此連接固定而做為項圈，不使用時則可以將兩條帶捲收回殼體內隱藏；該殼體還可以連接額外的裝飾物，讓打扮寵物更為方便。
