What am I?

Cover the clues so you can only see number one. How many clues do you need before you know the answer?

1. I am about 3cm long and 1cm wide.

2. I was pinned to clothing and designed to look classy.

3. I was also practical and one part of me could become a pencil.

4. I was worn by ladies.

5. Young ladies took me to dances and balls just like they take mobile phones today.

Answer in the next TreasureLink.