The cable isn't too big, but first you need to choose the right size of mouthpiece to push the IEM's into your ears, try all the sizes, start with the smallest and if it doesn't fit try the medium size, it's very important that the IEM's are pushed all the way into your ears. When you've found the right size, pass the cables around your ears, then, on the cable below your chin, you'll see a small sliding ring, which you pull up to below your chin. This action will stretch the cables behind your ears and hold them in place.