See if I can describe the quilt I saw today. Measurements are approximate.
Big alternating squares in pastel prints
One square has a center square of about 12 inches with mitered borders of about 6 inches. Results in a 24" finished block.
The alternating block has an 18 inch center square with a 3" mitered border--done in a piano key lay out, more or less. This border was always the same stripe.
At any rate, the quilt was very attractive, and looked like it would be very quick to make.