Gymnic Sit' N 'gym Jr. Ball In 18in

Gymnic Sit'n'gym Jr. 35 Circle Soft Seating in Black/Yellow | 14 H x 14 W x 14 D in | Wayfair (14 H x 14 W x 14 D in)

Gymnic Sit'N'Gym Jr. 45 Therapy Seating Exercise Ball with Stability Legs - Yellow (ONE SIZE)

Really Good Stuff Sit N Gym Jr 18 Ball Chair 1 ball by Really Good Stuff LLC

Really Good Stuff Sit 'N' Gym Jr. 18" Ball Chair - 1 ball