Inka. You might find with your puppy you might be better with a half chain, as iit dose not have too much weight on it.
When my greyhound was a puppy I try a thick rope lead it weigh him down and he could not hold his head up. Now I use a thin leather slip lead which he likes. Alot people use leather slip leads or chain leads. It is what you get on with and also it is seeing what your little one will like.