If you want a summer quilt, you can use 2 layers of flannel, otherwise use 3 layers or 2 layers and a piece of light batting that is 1 inch smaller than your squares.
Stack your squares with right sides facing out. If you use batting place the batting in the center of your squares and sew and x from corner to corner to hold the batting in place.
Sew the squares together in rows until yu have the width you want your quilt. Use at least 1/2 inch to 3/4 inch seams to be cut to "rag"
Sew your rows together trying to match your squares as close as possible.
Either use a binding or do a double fold and sew it down for the outside edge.
Cut your seams every 1/4 to 1/2 inch being very careful not to cut your stitching line.
Take to the nearest laundromat to wash and dry your quilt after your finish it. (I never did explain to my husband how our laundry drain got plugged :mrgreen: ) If you do wash it at home, put it into a mesh laundry bag or pillow case to help catch the fuzzies and lint.
Cathy