I found a butterfly pillow cover in a knitting book, but the pattern seemed overly complicated. Mom loves butterflies, so this was something I've had in mind to knit for Christmas for a few years. I kept the butterfly pattern, but changed the pattern above and below that. It's knit in Alchemy Yarns - Temple, superfine merino wool. I basically knit a long strip, then folded over the top and bottom with an overlap where I used buttons, and threw in a few button holes. I then seamed the sides. If I were to change anything, I'd probably reduce the number of buttons and leave more space between the edges and the exterior buttons.
Different versions I worked out in photoshop prior to deciding on colors and pattern.
