8 x 10
I did a demo of clouds at a recent art class using acrylics. I haven't used acrylic paint for awhile and getting used to the quick drying again took a little adjusting from the oils I'd been accustomed to using.
Clouds, I find, are best created with a very dry brush with a minute amount of pigment on it. Building layer over layer gives some structure to the cloud amd I've found that using a Q-Tip end is perfect for feathering out edges of the cloud into those transparent, wispy edges.
These clouds are cirrus and one of the most abundant. The wind teases them out into streamers and thin layers and usually indicate a change in weather within 24 hours, often fine weather.