This is the block I designed all by Moiself for this project. It's called Bug. It's a modified version of another block I designed called Grass (which is for a different project I might talk a little bit about a few months from now).
The center square is one inch, um, square. The legs are 1/4-inch wide, 2- and 2.5-inch in length.
Here is a shot of prototypes in single- and double-leg form. (Protos are raw tests thrown together just to get a general sense of how the end product might look. For example, first thing I figured out was the legs have to be a teeny bit wider. Ignore the interior topstitch on the one on the left, as protos are also for Experimenting. )

Since these Bugs would contain words at the center, I adjusted to make the square a little bigger but left the leg width & length the same. Here's a couple of Bugs all formal with seams pressed and everything. (There are nine total, each is different.)

The font is H.P. Lovecraft's handwriting. I wanted to use his cursive but it turned out to be too difficult to read at the size I wanted. Also I ended up not embroidering each word as originally planned because I forgot that the transfer paper leaves a waxy surface unfriendly to embroidery. (One day I'll be set up to print directly to fabric. Until then, no word embroidery.)
What turned out to be the most difficult thing with the Bugs was figuring out where to place them on the shell. It took about two weeks of pinning, changing my mind, pinning, changing my mind, soliciting opinions, pinning, changing my mind before I came up with a layout I liked. When I tacked them down I left about 1/8-inch of the end of each leg loose in hope that they will unravel a little bit down the road. We'll see what happens with that over the years. If it works, I think it will look cool.
If you like this block and want to use it, my only rule is you have to call it Bug.
Illustrated instructions on how to make one will have to wait until after Geek Vegas, as my other lovely assistant's camera is still on the fritz.
The spider would have been blocked had this been a quilt as originally planned. For the dress I left it free-form. Sort of. Here it is sewn into the shoulder. It's okay. I'd like the front legs and antennae to be more spindly, but I couldn't make any of the protos work.

Another surprise, it turned out I liked the raw sleeve ends so much that I couldn't put trim on them. This is unfortunate because when I did the zig to seal the fabric I used black thread, not expecting the sleeve ends to be visible. Had I known this 70s-era linen would drape so well, I'd have done the zigs in the storm thread. With hope, the very ends will unravel a bit down the road, giving the sleeves a slightly ragged look.
Surprise the third, I put the trim on the inside of the wedges instead of the outside. I like it.
Though I realize The Dead would most likely describe it as overly done, what with this thing having a lot of stuff going on at once, it makes me happy.