The panel weighs a little over a pound, maybe 20 oz. I don't know how big I can make them and still keep the thinness and light weight;...possibly 16X16. Anything larger and they might break when you try to pick them up. 14X14 is a safe size, as you can see by the image.
I haven't painted a pure fresco yet. I've done perhaps 15 panel-paintings since I began the process four years ago, some of which failed due to poor plastering. I have a little more knowledge now, but still I struggle with the concept of painting fresh with many layers, and especially with waiting between 'washes', so all the other "paint-over" mediums are a hard habit to break. I'm excited about receiving the Florentine lime putty from your FrescoShop soon, being determined to do a true fresco with real aged putty from Italy.
I still don't understand how to use white tints using lime putty or even bianco sangiovani. Lime white changes the colors after a few days, and bianco sangiovani doesn't 'calcinate' completely, but leaves a little white powder after drying. I have good bianco sangiovani from Zecchi's, so the quality isn't the problem. I want to be able to use some whitened tints, and not just paint transparently, like watercolor. Michelangelo's paintings have a lot of beautiful rich tints with white in them. It's one of the last barriers in fresco for me, along with my ignorance of good plastering technique and mortar understanding.