Has anyone made slipcovers before?

I finished painting my last piece of bedroom furniture this weekend! I still need to get a couple more things for the room before I post some pictures. I can't believe the project is almost done. It's taken over a month of weekends but I'm really happy with it. Now that it's done, I'm thinking of my next big project. I bought a new sofa 2 years ago and it's a dark navy blue and now I want white