Hello, these tiny quilts are between 25x25" and 35x35": 60x60 cm bis 90x90 cm!
I prefer 28x28" : 72x72 cm, because of the width of the batting over here: there fit two of these little quilts side by side and so there is not so much waste!
And yes, I am sewing for the preemiequilt action:
https://preemiequilts-europe.blogspot.com/
They have some hospitals to which they take these quilts. in Germany, Austria and Netherlands!! Till now over 10.000 were sewn and donated!
They have guidelines for these quilts: how big, only new and cotton fabric, poly batting, not so much stitching and quilting...
And it is so much fun to sew these preemiequilts, it's quick and one can use up the scraps!