Quilt block patterns come in all shapes and sizes. Some quilt blocks are constructed using several smaller quilt blocks together, some are simple four patch or nine patch blocks, some create secondary designs when several of them are added together - and some have an amazing three dimensional look just on their own.
Finish with a round of black strips on every edge: two at 12.1/2" long for the top and bottom and two at 16.1/2" long for the sides.
It's the combination of the colour placement and those extra black triangles that make this block look so much like a raised block. I think it's a delightful example of optical illusions with fabric.
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