So to answer your first question.
Can you put a duvet cover over a down comforter.
Sure you can put a down comforter inside a duvet cover no problem.
Duvet covers always have tabs or loops on corners and sometimes even on the sides to secure a cover.
So even if your duvet cover measures the same as your comforter it will likely shrink 3 5 and fit more snugly over your comforter.
Your comforter will also likely shrink 3 5 when washed.
Some comforters also come with tabs but the majority do not.
It most likely contains cotton to be classed as down proof to keep fill inside.
And again the cover is inside out.
Basically take the comforter.
To get the comforter inside the duvet cover simply open up the duvet cover and turn the whole thing inside out.
Put your duvet cover on the top of your bed and make sure the opening is at the foot of the bed.
Here are step by step instructions on how to complete this task.
Then take the comforter itself and just spread it out on top of the cover.
Putting a duvet cover on your down comforter is much easier with 2 people although it can be done with just one person.
Start by taking a duvet cover and turning it inside out and lay it out on the bed with the open end down near the foot of the bed.
In fact it s always better to have a duvet cover and it s also more fun.
Ok now here s the real trick.
Duvet covers are meant to be washed and will experience fabric shrinkage.
Start at the top of the top end and just roll it over all the way down.