I made four rag uilts for grandkids bunk beds, I cut low loft batting 1 inch smaller, sew X thru middle, 1/2 inch seams, Pretty much the same as everyone else has said. but the tip I have is snipping the seam allowances is the most boring job in the whole world so snip as you go. I did any seam allowance that would not be sewn again. Good luck and have fun