Connecting pieces

I’ve done two separate pieces and I want to make a box-bag kind of thing. The thing is I don’t know how to connect all these pieces together. :frowning:

HELP!!

Welcome to Knitting Help!

If you’re making a bag it’s less important how they are seamed, but to do it nicely I suggest using the same one you’d use to seam a garment. It’s called mattress stitch. There are instructions here at KH-
http://www.knittinghelp.com/videos/knitting-tips

And here-
http://www.knitty.com/ISSUEspring04/mattress.html