To my eyes those things in the corners of this design are pineapples! That was not likely to have been the case when the designer came up with this very interesting Square. It has something regal about it too. See the crownish things in between the pineapples? I really like this design in its entirety just as is.
Size of square:
2.625" x 2.625" (6.7cm x 6.7cm)