Here are my instructions for T&T wipes (turned and topstitched):
- cut 2 pieces of fabric ~1inch larger in both width and length bigger than your desired finished size (ie, if you want wipes that are 8x8, start with 2 squares that are 9x9)
-place the 2 pieces of fabric rightsides together and sew with a straight stitch all the way around (about 0.5" from the edge of fabric), stopping about 1 inch from where you started so that you are leaving about a 1 inch gap- this is the hole that you will use to turn your wipes rightside out. I find it works best to make the gap in the middle of a side rather than close to a corner.
- I like to clip the 4 corners now so that there is only a tiny bit of fabric beyond each of the corner points (about a mm or 2)- totally optional but it makes for better looking corners when you're finished
- Turn your work inside out through the hole you've left in your stitching so that the right sides are now showing, working the corners to make the wipe as square as possible (unless you've sewn curves rather than actual pointy corners)
- Sometimes I iron the wipes at this point to make them look extra nice (but you don't have to, lol)
- pin the two sides together where you had left the hole for turning your work so that the gap is closed- this holds the gap closed when you sew over it next
- Topstitch all the way around the wipe (don't leave any gaps) about 0.5cm around (I usually just use the edge of the presser foot as a rough guide). This closes up the hole from turning your work and looks pretty. I sometimes use a zigzag for the topstitching but a straight stitch is fine.
T&T wipes are super durable but you can also just put your 2 rightsides facing out (like a finished wipe looks), straight stitch all the way around and then do a tight zigzag to try to overlock the edges. I don't think it looks as nice but it's functional and pretty quick. I have a serger now so I just serge the two pieces together quickly. I think the breastpad instructions were just trying to mimic how a serger works- a serger does one row of straight stitching and another row of overlock around the edge all at once (2 needles and 4 threads working at once). You probably could just do the zigzag and it would work just fine.
hth- if you need some piccies, I can try and do a photo tutorial for you but I probably wouldn't have a chance to post that until Monday