Mushroom of felt. 2 - 7 centimetres.
An example of making.
Cut cloth (felt). Only the back of the cap is thin cotton cloth.
Make the rectangle to a circle by gathering.
The back is smaller than the upper.
Sew and turn inside out.
Stuff polyester fiberfill in cap and stipe.
Sew the stipe to the cap.
Glue the small dots on the cap.
If you omit the gills, it is easier. Use a circle of felt at the back.
Another example --- mushroom (not toadstool).