Then she asked me to make my sister's quilt. I had gotten better at sewing at this point (3 years later) and decided to go for it. My quilt is queen-sized...my sister's ended up being king-sized. Here is the finished product:
The dang thing took up my entire living room! I love this idea though, it's a nice, practical way to make a great keepsake out of your old T-shirts.
You just need a ton of shirts, enough fabric to make the backing, pre-packaged batting for the center, and an extra yard or two of fabric for the spacing (I like putting a decorative spacing between the panels, I think it makes it look more polished).
Then you decide if you want your spacers more decorative, like my triangles here, or just squares. Cut your pieces (measuring everything to see how it will be laid out, and start sewing! I suggest sewing each row together first, then the rows get sewn together.
Your front is done! If you have to piece the back together (you probably will) do that next. Then lay the backing out (wrong side up), put the batting on top of it, and then the top on that (right side up. Pin pin pin!!! You want that puppy as secured as possible!
Now you can sew the three layers together...using whatever stitching pattern you want. I usually use a grid pattern or a starburst pattern, I'm not great with decorative stitching.
Using the last of your fabric, create a double bias tape to go around the edge. Place it, pin it, and sew it in place. You're done!