In my previous post, someone asked what I use for sketching. I've settled on this Homee watercolor pallette. It's about 10.5 X 5 inches when folded up and inside I keep my Holbein watercolor brush and right now I'm using a 01 Prismacolor pen. I also have a pencil and a piece of paper towel.
It's nice and flat and will fit into a purse or backpack easily. My pen and brush etc. fit right inside when it's closed. I use a small Moleskin sketchbook for my garden journal and a larger one for landscape sketches.