Details of the signing are not available to the public.
Crystal Dunn is quoted as saying: (taken from the Chelsea FC website in the Sources below):
Dunn said: ‘It’s a big personal challenge for me but I am ready to take this next step in my career. Playing for Chelsea is a unique opportunity for me to take my game to another level and I think the moment is right.‘I have only been to London once before but there is something that grabbed me about Chelsea. The whole family culture – the unity, the morale – is making it feel just like home.