Here are three of them (my favourites).
It's all tied into the mag's October issue, which marks its quarter of a century of existence.
Each room set is worth around £16,500, and winning a competition is the only way I'd ever get that sort of finance into a room in my house. So which would you choose? My fondness for blues and greens makes this one my favourite.
Those luscious tiles on the wall, above, you may recognise as being by Bert & May, who I wrote about a couple of months ago. (And I'm still quite entranced by the combination of cool Mediterranean tiles and an tactile antique velvet chair that you can see half way down the post, should you be so inclined to back-track.)
Above are two more of the room sets up for grabs. You can see all six rooms on the competition's Facebook page, along with details of all the items, should you be feeling flush enough to buy rather than try to win them.
Oh, and if you look at rooms like these wistfully, wondering how people manage to throw things together so effortlessly... Here's how the photos got to look so good – and there's definitely some effort going on.
To enter, you need to get hold of a copy of the October issue of the magazine if you haven't already. In Willy Wonka fashion, it has a code on the front you'll need to type in. These things aren't just thrown together.
Find out everything else you need at elledecoration.co.uk/win