Six page paper on GigE due soon

I have about 3 1/2 more hours until my paper is due. I’m almost done but still have a tad bit more to go. I’m going to return that chair I bought. It doesn’t really cushion my buttocks. I’m just going to save the cash I got and pick up a Herman Miller Aeron chair. My only worry is that I share the chair with my girlfriend and she’s very petite. I’m much bigger than she is and I don’t want to buy a size that will make it feel uncomfortable for her.