I'm not telling you that this is the best way (Must not be, otherwise anyone could buy a large-pillow-making-duvet-cover at any BB&B or Amazon!), but it works well for me, and I get a large and comfy feather pillow during the Texas Spring, Summer & Fall! Not to mention, if at any time I feel cold, I can just pull out the comforter without having to run up to the attic!
I bought the ruler fabric to make Dad a little pillowcase, but I later realized that I did not buy quite enough for him, so I pieced it with the blue cowboy remnant that I love (but never could decide what to do with). The back side is a fun Route 66 print Mom bought me. (all 3 fabrics were bought at Jo-Ann...and the dog print the other pillow is wearing)
I was going for a vintage western feel...I think that I caught it. =)
Velcro on the open side, closes up nicely. A twin comforter fits nicely in this 33"x33" cover.
(I'll share this post on "Have a Daily Cup of Mrs. Olson")