If you can tat split rings and follow a diagram, the cross is pretty easy to make. It measures 2 inches across and 3 inches from top to bottom in Lizbeth size 20 thread. Here's a diagram that I put together in Inkscape (right click and open the photo in a new tab to see a larger picture):
Update: Click here for the PDF file with full written instructions and diagram
This little cross is made with a stitch count of 4 between every picot. In theory, the cross can also be made with all 5's or all 6's. That's because six ringed flowers are super easy to make. Just use the same number four times for each petal. Take a look at a page from my binder below:
The binder is a new side project that I've been working on. Every time I have spare thread left on my shuttles, I tat a small ring formation. I bought a pack of trading card sleeves to store the samples in. Each sample is taped down to an index card that has been cut in half to fit in the sleeve.
Right now I'm just tatting flower formations, but I will eventually expand the project into other small shapes. It's like having a reference book, and has already come in handy when creating new designs.