New in Package Christmas Pillow Covers Set of 4

This is a set of four pillow covers that have hidden zippers on the bottom. They are brand new in packaging. I believe they’re supposed to be 16 x 16 but as you can see in the picture they measure about 15 1/2 x 16. I just want you to have a reference in size, so you know if your pillow will fit in it. The back of them are solid as seen in picture. In the pictures they kind of look navy blue but they are definitely black.