I love making these burp cloths because they are so easy! I always enjoy the ragged edge ones, but these terry/flannel ones are much faster and they make great baby shower gifts that any mom-to-be would appreciate.
You will need:
a piece of flannel print cut to 17 x 8
a piece of terry cut to 17 x 8
a spool of nice, thick thread (best for sewing with terry)
Cut your flannel to size, then use it as the pattern for cutting the terry. If you pin the flannel to the terry upside down you will be ready to sew the right sides together as soon as you are finished cutting.
With right sides of the fabric together and using a 1/4" seam, sew around the perimeter of your rectangle leaving a 3" hole for turning. It can be helpful to mark where your stitching will begin and end with double pins. I seem to have a bad habit of stitching up the whole thing and leaving myself no way of turning my work, so the pin thing really does help prevent that.
Trim your corners on an angle as close to the stitching as possible (without cutting your thread) then turn the rectangle right side out through your 3" hole.
Wiggle your corners to make them as right angled as you can, then press the fabric with an iron (don't forget to fold in the edges where your turning hole is and press well). Ironing is really important because it helps give a really crisp edge to your work and makes the next step (top stitching) easier.