Avoid Soferia at all costs! Between their ambiguous web interface, lack of a sales telephone number, buggy computer system, and belligerent attitude towards refunding when the wrong sofa-cover was sent, I strongly advise against doing business with this company as a private customer. If you do use them and need to return goods to them, keep strict records of everything.
I ordered two sofa covers from Soferia to fit the 3-seat Karlstad sofa from Ikea. All told, it took a month for the sofa covers to arrive after I ordered them, and another five weeks after that before I got my refund. It took a lot of work to get the refund, and I still had to pay for the high return shipping. This is not something I'm about to do again. All in all a very stressful and unpleasant encounter.