3/4 inch plywood (4 x 8 feet)
You'll need more than one sheet (1.5 to be precise).
One sheet of plywood range from $30 to $80 depending on the qualityand the origin of the wood.
Mine was $35 each.
For $70, I got one funny chair and extra plywood for more projects!
How to make it:
To start, I had no plan, just the picture of the original chair above.
So let's look at the chair again:
There are three different shapes : the croissant shape, the "spine", the legs.
The croissant shape:
I started drawing on the plywood a croissant shape that look like this:
|The croissant shape|
It's a project that needs patience and a little bit of skills, but if you have the patience of going through all the cuts with enough precision you'll end up with a fun and sturdy seat that is more confortable than it looks.
Update: The Fishbone chair is generating a lot of traffic on line, so, If you decide to try and need extra tips (like how to keep the notches at the exact same distance all the way through...) , don't hesitate to leave a comment, I'll be happy to help.