Alu_Rathbone

So, I apparently have a lot of questions! I've noticed the trend! So sorry about that...

I don't know what these pillows are called, I've heard many names for them, such as back rest, husband pillow; ect.

I have one of these, it's an old one that had barely any use and is still very plush, as if bought today. I ab-whore the the color, it's a green and brown plaid, and I really really don't like it. I want to make a pillow case to go over it, but no clue how to make a pillow case for it and how much fabric I'll need.

I do have the fabric for it... just need to know how much of it I need and how to make the pillowcase! Thank you!!!!