Ok, here we go.
The first photo shows you the bed and a close up of the pillow cover.
Next I bought 2 yards of osenburg material. This is the first time I bought this material, I usually buy muslin, it is cheaper. I hemmed all four sides about half an inch size for the hem. I folded the material long ways because this is how it will lay across the bed. Then I folded both side in so that they met in the middle. Shown in photo.
As you can see, I sewed across the bottom of the material so the down the middle is still open. That way when you put the pillows in it, the pillow cover has a nice edge and looks like the pillows are in it like a regular pillow case.
Next, I am showing you the pillow in it so you see how it tucks in. I just put the pillows on the bed, lay the cover over it and tuck the bottom under the front of the pillows, and the back tuck under the top of the pillows. Done, very simple.
Now the star. I didn't have any black material laying around or even felt, which would have worked even better. I did have old T-shirts I use to paint furniture with. I laid the T-shirt on the kitchen table and laid a metal star on the T-shirt I just took off the wall, traced with a ink pen and cut it out. I measured to find the middle point of the material both ways. I layed the already made pillow cover on the bed (more room) so that the front side was up. I found the middle of the pillow cover from the sides and the top to bottom. Then from that middle point, I found the middle top and bottom on the left half of the center point and the right side of the middle point. I hope I am not confusing you. This is just how I do things. So for example, if the material is 36 inches longways. Half of that is 18, pin it. Top to bottom is on this material lets say 15 inchs ( I'm just making the measures up) half of that is 7 1/2, pin it. Then trace your marks so that they meet. in a cross. I folded my star in half and put it there. I just sewed it with embrodery thread, only because it is thick and less to do. I just sewed it. No pattern, Just sew. Add the buttons I had in a old jar from the auction. Done. I hoped this helped.