Best Know for securing a fabric bracelet on a wrist?

So I made something like this

https://www.washingtonian.com/2012/06/04/diy-how-to-make-jcrews-22-cloth-wrap-bracelet-for-under-2/

Here's the direct images for convenience.

https://www.washingtonian.com/wp-content/uploads/2012/06/picking-knot-place.jpg

https://www.washingtonian.com/wp-content/uploads/2012/06/last-bracelet-2.jpg

And I need a different way to secure it, so that they can be worn with variable wrists so it can be adjusted, and I need it to either be not noticeable or have a descent aesthetic.

There's not too much length/real estate so I can't use knots like the slipping knot used for regular bracelets.