Does your duvet cover fit your down comforter? I can't make my duvet cover fit my comforter, it other shifts...

I can't make my duvet cover fit my comforter, it other shifts and it's kind of annoying. any accepted wisdom on making it stay?
What comes first? The baseboard trim, the...
Answers:    go to bed tub and beyond. They have in the order of 3 different things that will help your cover stay contained by place. They are like little snap buttons that you put on adjectives four corners. We used to have like problem and this is great. You just rob them off every time you wach your cover.
I am trying to work out what type...
I used to give somebody a lift a needle and thread and lately run and few loops through the duvet cover and comforter on each corner after I have lined them up. You could enjoy the wrong size. Comforters can come in King, Queen, Full, etc.