I make t-shirt quilts as a small side business. I modified the Too Cool T-shirt method by adding blocks of fabric in between. You can purchase the too cool book at http://www.toocooltshirtquilts.com/ (I have no affiliation with Too Cool). They don't add backing to their t-shirts but I do. I use 906-F. I FMQ the entire top but I don't stitch over the logo itself. Using their random block method it is easier to incorporate odd sized logos into the quilt. Pic of my work attached. Good luck to you!

I also use the Too Cool T-shirt method. I cut the T-shirts based on the size of the logo on the shirt. The Too Cool T-shirt method uses sizes in increments of 4 inches ( cut 4 1/2 x 4 1/2, 4 1/2 x 8 1/2, etc) up to 16 1/2 x 16 1/2. I use leftover T-shirt fabric to fill in the 'holes' (since not all blocks are the same size). Here is one that I did. This quilt is queen size. The red rectangle was left over T-shirt fabric with no logo. I do NOT use interfacing to back the T-shirts.

thanks for everyone's input. The pics of the quilts are outstanding. They have given me some great ideas.

If I've got a bunch of smaller ones, I'll take the BACK of one of the shirts that I don't use (and doesn't have a logo) and sew the smaller ones on it. Keeps all the blocks the t-shirt fabric.

I also make four patches out of the extra pieces. Also didn't want to waste anything.

Do you have enough small ones to make into an actual quilt block? If not mix them with the cottons to balance and finish the block (maybe a four patch or split rail or even a log cabin). And I would interface the cotton to balance out the weight.

Joyce that is what I was thinking of doing with the extra pieces. A member in my guild did a lecture last year and she suggested either doing horizontal or diagonal rows of the the blocks. i guess I don't want it so structured. I'll post once I get going with them. Thanks to all.