This is the type of mat (work surface) FeltedSky recommends for anyone new to felting who doesn't want to invest yet in burlap or wool. Keep in mind a firm foam mat will hold up a while (depending on the types of projects you're doing) but will need to be replaced once it starts to break down.
These tiny little mats measure 3x3x1.5 They are made of the same type of foam as our larger mats. The perfect size if you're mending a hole or embellishing a pocket.