Once you have finished sewing all the squares and rows together, you need to sew a 1" allowance around the perimeter. I like to use a decorative stitch.
I can't get much fancier that that considering my machine is 41 years old! Yes I have an old Bernina. It was used when I got it for my High School graduation. But it is a workhorse, sewn many a quilt, purse and even my wedding dress!
I also add a label, just in case they forget who made it.
Have a great Monday!