Borders are for you to decide. Some quilts need enlarging and borders required. Some people just like the look of borders ( one or more) . Others like the piecing to go to the edge without a border just binding.Others like to birth the quilt I've rightsides together and machine almost ( 6"- 10" gap) round and pull through gap to rightside.
the choice is yours you will get numerous advice but at the end it is your quilt.