Adjustable braces providing improved levels of adjustability and ease of use are provided. Two components of an adjustable brace can be pivotally fastened to one another at two ends, and define a size-adjustable opening therebetween. The two components can be coupled to one another via an adjustment mechanism that allows for an adjustment of a vertical position of one component relative to another component. Two pivoting locking member can be provided that captures an adjustment and blocks a movement of the adjustment mechanism.
