I like the look of a 2 1/4 inch binding the best.

I forgot to say you need to press the binding open very well on the front after it is sewn on. You need to see the ditch into which you will stitch. I think this method will work very well if you glue the back well around those corners.

2 1/4 inches cut on bias; folded/ironed in half; machine sewn to quilt front; folded over and hand sewn to back...using "hair clips" (from K-mart) for the "baste" and to hold binding on it's way around... no problems!!!...and probably my favorite part of the process.

I adjust the wide to match the quilt. Some are as much as 4 inches while others a about 2 - 2.5. I go by the look I want to achieve.

I use 2.5 but have used smaller.

Also if you are having your quilt in a judged show your batting needs to fill the binding.
Robin in Brownwood TX

2 1/4 inches for me

I do, too, except on some smaller projects where I like the very narrow binding.

I use 2 1/2" . I also leave 1/4" of the batting all the way around the quilt to fill the binding .

I've been making mostly quilts for homeless families, which are often string quilts on a foundation with a heavier back and polyester batting. I find that a 3 inch binding, folded double, is very easy to stitch onto the back and bring to the front. I did use 2.5 but had to fight with it too much. I also find that using a Pfaff with IDT makes the job a lot easier.