Test it out. If you need to make them cozier, you can always pick up a pack or two of Mountain Mist fiber fill at JAF with a coupon for dirt cheap. I almost never buy foam. My grandmother taught me to make my own pillow forms using cheesecloth when I was in elementary school & unless I'm in a hurry that's what I continue to do to this day. Just make sure that you cut the strips of batting both width & lengthwise (think oversized confetti) so it doesn't get knotted or bunched. Encasing it in muslin or cheesecloth or such first to make a pillow form usually helps me get more uniform results & more stuffing inside the pillow