There was a piece of cloth tied to the dog's collar.

有一条布系在狗项圈上。

《柯林斯英汉双解大词典》

As we said goodbye, the dancer bent down and removed a piece of fluff from the collar of my coat.

当我们说再见时，舞蹈家弯下腰，从我外套的领子上取下一团绒毛。

youdao

The skirt are connected into one-piece dress. A wide range of styles, with long sleeves, short sleeves, a collar and no collar style pattern changes.

裙子相连接成的连体服装样式。款式种类繁多，有长袖的、短袖的，有领式的和无领式的各种式样变化。

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As a further point, I do believe that the green-collar job piece of this is important.

CNN: Part 1 of CNN Democratic presidential debate

The owner dials their pooch's number and after one ring, it automatically connects to the phone on the dog's collar, allowing the dog to hear its master's voice, transmitted out of a speaker built into the collar-piece.

CNN: Give a dog a cell phone

We were all ready to start harshing on the Top Tag Pet ID--a USB thumb drive that contains vital info about your pet--because it seems pretty silly to assume that a lost animal's rescuer would know what the hell to do with that small piece of plastic dangling from Tinkerbelle's collar.

ENGADGET: Top Tag Pet ID USB thumb drive