Signatures are blurry in Apple Mail

I found a solution to this and wanted to post it here since I saw others had the same problem. Apple couldn't even figure it out for me.

It appears that Apple will fill the width of the page with the signature image upload (and a smaller image at a high resolution will also fill the screen but then appears blurry).

What I did is made the art board of the graphic larger so that there is a few inches of space to the right of the signature. This appears to retain the crispness of the image while scaling it appropriately to the page. Also, you have to select "actual size" in the drop down menu under your signature selections when composing an email. Hope that helps!