I am using queen sized sheets, 100 percent cotton (good sheets, too). They ripped so I threw them in the dye with my tablecloth when I dyed that. Teal rit.
I tear them into approx 2" strips, I eyeball it and use scissors to nick...then I just rip them all the way. I pull off the strings and seams if necessary. And then I crochet single cr with a size N hook.
I'm just doing a rectangle, so I started with about a 2" chain, then it's just back and forth.
I had to pull it out because the first three rows or so I was inadvertently increasing, and the result was an uneven edge. So I did go ahead and pull it out and then re-crocheted it correctly and I'm already further than what I have shown here. It goes really fast, but it takes some strength of the hands and shoulders.
My hands and shoulders ached for a while, but they don't anymore. Though I've taken a little break, I might feel it the first day I start back up again, which will probably be today. I need to tear more sheeting.
So when I run out of this color, I'm going to make a border using a different color. I am not sure what color yet..either another green or perhaps red, if I can find red dye. The sheets I will use for that step are also 100 percent cotton, but they are striped white and tan (now). These sheets were an Indian patchwork print, with reds and browns and even yellow, I think.
This is for my daughter's room.