Reduce part in size

Hello,
I have a problem with a part I've created in solidworks. It is abicycle wheel and while making it I made it double the size that itwas meant to be. Is there an easy way to make it half the sizewithout starting to redefine the sketches (quite a lot of work,probably would be easier to redo it), so all the lofts would alsolook like they do at the moment, just half the size? The thing is Ido not need to change the part anymore. Is it possible to somehowmake the part solid and then reduce the size? I appreciate any help=)SolidworksParts And Features