For me it brings to mind freedom more than cuffs xD Usual symbols include birds and ships (which are just plain awesome). That would be really sweet with either one of those, maybe on a banner of sorts.
It depends on what you feel, though. Do you feel more hopeful to be free, or is it more sorrow over captivity? If you go to pretty much any tattoo place you feel comfortable at, you can talk with an artist and they LOVE designing tattoos. Good luck!