should go in 2 or 3 separate folded pieces- a neatly pressed top=
a neatly pressed backing
and a batt- unless the quilter provides the batt
the backing and batting should be larger than the top---i tell my customers at least 5" all the way around (meaning if your top measures 80"x90" the batting and backing needs to be AT LEAST 90"x 100"
i think some la'ers do not require that much- that is my (wish)
you top and backing should be squared (the backing should not have rough= scissor cut ends)
if the top has alot of seams along the edge it is also a good idea to do a stay stitch all the way around the top-
when the top is loaded on the frame it is held taut- and sometimes those edge seams come undone unless they have been stay=stitched....just a straight stitch about 1/4" in all the way around will keep everything together during the process.