An orthopedic brace having length adjustable supports is provided. The brace comprises upper and lower supports rotatably connected by a hinge. Each of the supports comprises an elongate portion having a channel along part of its length, and a sliding upright nesting within the channel. The upright is longitudinally translatable within the channel so that the support length is adjustable. Flanges are provided along edges of the channel to prevent lateral separation of the upright from the channel. A spring-biased button protrudes from a surface of the channel. The button cooperates with one of a plurality of holes in the upright, providing a positive lock to retain the upright in one of a number of predetermined positions. The upright is also completely removable from the channel. Removal of the upright shortens the brace. Straps cooperate with brackets on the supports and/or uprights to secure the brace to a patient's leg.
