Another sight for shirting patterns is Jo's Country Junction. She uses shirts in a lot of her quilts.

You're right. That is one awesome rabbit hole, and I have bookmarked it for a all day lookhttps://cdn.quiltingboard.com/images/smilies/smile.png

if all have been washed, the fabric content won't make a difference. You could try ding some truly improv piecing - check out Victoria Findlay Wolfe's "15 Minutes of Play". She does it with small odd shaped scraps but you could do the same concept with larger pieces.

Marcia Hohn has a free pattern, "Grampy's Shirts" on Quilters Cache. I just love it for the small triangles where you can add little pops of bright colors. I have it in my bucket of someday stuff, so no, I haven't made it yet and can't vouch for it.

Probably a more important criteria - can all the components be cleaned/washed the same way?

It does bother some people to mix pure cottons fabric with "blends" -

As long as one is aware of what one is doing - - -

I checked the tags again just to be sure, but they all came from the same company and can be washed the same way. Her dad took excellent care of his clothes, we found some sweaters that are probably pre-1980s and they look like they just came off of the rack. No snags, no holes, no stains, no color fade. I also knit when I can, whatever sweaters are too small, I'm going to unravel and use the yarn for something else.

See, this is why I love this forum so much and everyone that is here - all of you have asked questions that I never would have thought about in a million years. All the sites you've given me are definite rabbit holes, I'm going to have to be careful when I cruise them or I'll lose a day or two in them, lol. I certainly didn't know that most men's shirts are made with that much fabric, I've definitely got enough with these four to make a queen-size quilt!

I am a hst person when it comes to memory quilts. There is a block pattern in the Quilter Caches https://www.quilterscache.com/D/DepressionBlock.html . If you have enough fabric from your shirts this could make a nice lap quilt or throw or even larger quilt. Just something to think about.

This is a great - not so difficult to do - bock/pattern that always seems to finish so beautifully!

I've never worked with old shirts before, but I would consider applique. You could make flower petals and the middle circle with the shirts. This would give you some flexibility for background fabric as well.

Use the pockets! I made them the center of a quilt made from my 'grands' shirts. Looked cool.