Use font: Wingdings font and type a left bracket: [
That should be the Yin-yang symbol:
[
You can make it as large as you need (to the limits of your paper) by
typing in the number of points in the font size window (I found that 650 points was about the largest I could get on a standard size piece of printer paper).
You'll need to trim and limit the size of the images you locate due to limitations in the size of the Yin-Yang you can
print.