Sean Ragan writes:

This lampshade is made almost entirely from stay tabs that are interlocked together without wires or fasteners of any type, using a kind of “chain mail” technique that I invented. Careful study of the photograph will probably tell you all you need to know about the chaining technique. Each tab is bent to approximately 120 degrees and then snipped at the top. The top loop of the tab is then threaded through the bottom loops of two adjacent tabs on the row above. Rinse and repeat to create mail.