Which words are being defined?

1. be the right size   fit
2. not cheap, but not expensive 
3. a large cupboard for keeping clothes in 
4. popular with people at a particular time 
5. the place where you try on clothes in a shop 
6. Armani and Calvin Klein are examples of this 
7. a person who works in a shop 
8. look after customers and help them to buy things