Medline Foam Cut-Away Knee Immobilizer, 16 in. to 24 in.

Manufacturer Description:

Pile foam material can be trimmed so it's easy to adjust the shape and size
Beveled aluminum stays throughout for rigid support and immobilization
Movable medial and lateral stay pockets can be placed at any positioner angle; contoured posterior area helps prevent the splint from migrating
Alternating 2" (5.1 cm) loop-lock straps provide consistent compression; 4" (10.2 cm) patellar compression strap helps prevent swelling
19" (48.3 cm) L, 25" (63.5 cm) circumference thigh; 19" (48.3 cm) circumference calf