12" would be too wide to actually miter the corners, and would make the quilt too wide, so I trimmed the border strips down to about 10-1/2", keeping the most important elements of the print from being cut off too much. I attached the side borders, then the top & bottom, then mitered the corners. The borders were still too wide - I had nearly an inch beyond the miter seam - so I knew I needed to trim down the overall size.
By trimming the borders to 9", the corners came out okay and the overall size of the quilt is 41" square. I'm planning to use more of the focus fabric for the backing, and it's is 42" wide including the selvages, so I'm going to try to use it for the back without any piecing. Wish me luck!
This was trial and error all the way. It's probably the waviest and wonkiest but still square quilt top I've ever made. The piping (flange) around the center seems to have drawn up a little, and it certainly didn't make mitering the corners any easier, so I would not recommend it.
I hope it's true what they say, "It'll quilt out." I'll quilt this one myself with meandering in the borders and small stipple and some straight lines in the blocks. I'll quilt more densely in the areas I need to shrink up a bit. Hopefully that'll make the whole thing lay flat. I'm going to have to pin this one pretty densely to avoid puckers.
I don't think baby and mom will be too picky about the quilting or any residual wonkiness. And I know mom will adore the cute Forest Fellows (Robert Kaufman) print.
Linking up with Sew Fresh Quilts and My Quilt Infatuation