Originally Posted by Dede
If you pull the skinny elastic tight at the base, it won't come loose. You could put in a few stitches (or maybe even some kind of glue) for your peace of mind - it's up to you.
For thick elastics, I remove the shank and wire the elastic to the back before I make the button:
THANK YOU!! I did it exactly like your first pic and I thought I would just stitch it a bit just in case. But, it seems pretty tight. Awesome. Seems a lot easier than taking out the shank, but your other pics didn't look too hard either.