SITTS is designed for all sizes and shapes.. Children and teens 70 to 120 lbs, might like the smaller 2.5” to 3.5” cushions. Elderly or wheelchair users, as well, may want to use the 2.5″ -3.5″ in both variations. If you sit in a tall chair, the smaller cushions seem to be prefered. Customers of shorter heights tend to prefer the larger cushions for the added lift.
For users that spend extended periods of time sitting, the Serene Memory Foam Pad is recommended.