Sounds like a cover for what my grandmother called a bolster. She made the bolster for her bed out of regular pillow ticking and stuffed it with goose feathers. It was the width of a double bed. Then she made what looks like a really long pillow case for it. It wasn't fancy like yours sounds. I have both the bolster and the cover and keep it on the bed in my guest bedroom. I found 2 really pretty pillow coverlets in a vintage fabric shop and lay them over the bolster. My guests always remove the bolster and covers before sleeping, so I have 2 regular pillows on the bed as well. My daughter likes to use it as a body pillow when she is here overnight.