This set includes four inflatable stepping clouds with different textures for traction and stimulation: two green with dots; two blue with stripes.  Inflate them a little for softer cloud, or more for a firmer surface.  Great for developing balance and lots of different play activities & games.  Each cloud measures 31 cm x 24 cm (about 12" x 9.5"), and the set comes with a handy carry/storage bag.