These plastic seats are available in 2 inch and 4 inch heights.
They are available with our without lids.
We also sell two luxury branded types, Savannah and Prima.
The Prima Raised Toilet Seat can be autoclaved and has a rear aperture giving clearance for the coccyx as well as allowing for rear personal hygiene.  Size: 380 x 390 x 50 or 100mm (15 x 15 x 2 or 4 inches).