https://makeit-loveit.com/make-conti...s-tape-binding
This is how I make a continuous bias binding strip. You can find charts on the internet to tell you how big a square you need to start with depending on how wide you want your binding and how long it needs to be. I have never, in over 20 years, used anything but this type of binding, even on wallhangings. I always make extra and then piece those strips together to bind scrappy quilts.