Flat Seam

I am knitting a pattern where after bind off it asks to work a flat seam with tapestry needle and single strand of yarn to sew the edges together…does anyone know how to work a flat seam?
Thanks for any help…
Shelly

What are you knitting and where is the seam?

Mattress stitch is the flattest seam I know of. It’s the most used except in certain situations.

http://www.knittinghelp.com/videos/knitting-tips
http://www.knitty.com/ISSUEspring04/mattress.html