Cut out your inner and outer fabrics.
I leave a little more extra in the middle of the front to make closing the turning hole easier.
Clip or pin your fabrics together with faces inward.
Sew around the outsides leaving the turning holes in the front.
Trim off the excess around the sharper curves only.
Get ready to zig-zag on your elastics!
Zig-Zag stitch your elastic into the seam allowance while stretching tightly.
What they should all look like when sewn in.
Elastic through the legs and across the back.
Invert through the turning hole and get ready to close up the front.
Now back to the straight stitch to close up and do all your top-stitching.
Make sure you sew far enough in when going around the elastic areas.
You don't want to catch your elastic anywhere but on the very end of them.
All closed up and ready to add snaps or velcro.
I used black thread so you could see my sewing, but using matching thread colors will make for a much nicer and more-finished looking product.
Then just sew a little loop of ribbon to the inside of the keychain diaper to attach your keychain ring to. I don't have one on-hand to show right now. :)
All my free sewing templates are available for download here: