What Can It Be?

It's not the latest mystery by Bonnie Hunter, but I'll leave it as a mysery mystery to my viewers:

Can I find 5 for a matched set?

5-piece sets

More 5-piece sets

Needing lots and lots of 2" squares.  Some of these are bigger and will get cut down, or put back in the bin and I'll grab larger pieces...I need sets of 5, 99 to be exact.  Oh yes, I will say it is another happy scrappy!