This is technically done at 45" x 62".
It needs blocking, of course. But it could also easily be expanded, either by adding new rows along any edge or by extending all the rows in one direction or the other, Or by taking a new row as axis and building toward a rectangle in a whole new way
In any case, it could be finished off by adding half blocks to square up the edges (not that leaving the scallops and points isn't a nice look, too).
For now, I think I'll let it rest for a while while I turn to other projects, say for Holy Yarns.