I used to make a 2 1/4 double fold bias binding. Then...I 'adopted' my husband's drafting ruler that happens to be 2 1/8 inches wide by about 36 inches long...this makes it way too easy for me to cut my own bias strips by simply using the width of the ruler as a guideline. For the past 10 quilts (at least) and for the long foreseeable future my binding width will be 2 1/8.