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Try a search for Turning Twenty patterns & check out books #2 & 3. They are a little more involved than
the 1st Turning Twenty but do have a square or rect. that would work for embroidery.
I think rather than thinking of it as in blocks like a traditional quilt you could peace it in sections and then sew it together and use the embroidery blocks on top of the quilt
If this is a catalog picture, there may be no specific block.
Check some Swirly Girls patterns...they have several that are similar.
This is book 3 of Turning Twenty, "Turning Twenty Around the Block". This is probably more suited as it is designed for both horizontal and vertical embroidery designs.
OOPS, looks like SweetAna and I both had the same thought!
Hello, with the help of Mr. G.... I found this: