The tutorial I used called for jersey material from the fabric store. But since the hubs has kind of put the kibosh on spending money on crafty projects (especially since I'm really good at almost finishing them) and I'm kind of on a reuse-old-t-shirts streak, I used some old t-shirts instead. It took me three t-shirts to get enough strips. And I had to get a little creative with my cutting....
Then comes the fun part! Sewing! This pillow is VERY forgiving, so dive right in. You'll use 14-15 rectangles for each line. Just grab a rectangle, scrunch it up in the middle and sew it on. Easy peesy. Just be careful not to get your shag caught in your next line, as illustrated below. I only did that so you'd know what not to do.....and I'm having a love affair with my seam ripper.
Then turn it right-side out, stuff with fiber fill and hand sew the hole closed. (I think I might use a pillow form next time for a smoother looking finished product.) Voila! You have successfully made a fantastic shag pillow!