30-1000 Size: 4" W x 24" D Item sold separately Features: -Used to foster exercise therapy and general positioning.-Can be placed under the knee to allow weighted ankle lifts. Dimensions: -4" W x 24" D.-6" W x 24" D.-8" W x 24" D.-8" W x 36" D.-10" W x 36" D.-12" W x 36" D.-12" W x 48" D.-14" W x 48" D.-16" W x 48" D.