Flared Ribbed Lampshade - Baltic Birch

Choose from two different sizes of this lampshade. Both the same pleasing proportions.

The lampshade in the image is made from 3mm (1/8") Baltic Birch but it could just as easily be made from acrylic. 

Have access to a laser cutter and want to make this yourself? Buy the plans here: https://denzilmakes.com/products/flared-ribbed-lampshade-plans

For how to assemble this lampshade please watch this video:
https://youtu.be/cTBgo9NJqok?t=108