I brought these brilliant A4 non slip black mats when I was in Japan. They replace the need for a sandpaper board, nothing seems to move on them making them ideal for all aspects of stitching.
I am pleasantly surprised at how much I like working on a black work area, its quite kind to the eyes and certainly seems to make threading a needle easier as you can see the eye! Now Black one side and grey on the other to help with both light and dark fabrics.
Interestingly you can use an iron on these mats and they roll up for easy storage and can be washed when dirty.
For Patchwork Use:
-When you mark or fold the seam allowance in, the fabric won't move.
-Beads won't roll.
-Smooth surface won't damage your tools or fabrics.
-Easy to carry and store.
If you get a crease, cover it with piece of material and you can press with medium temperature iron (up to 180 degrees).
If it gets dirty, you can wash with water and a mild detergent, using a cloth. Dry in the shade (Do not tumble dry).
-Keep out of reach of children
-Don't iron directly on the mat (needs material to resist the high heat)
-This is not a cutting mat.