An adjustable support shirt comprising a shirt body and a pair of shirt body sleeves positioned adjacent to an upper portion of the shirt body is provided. The sleeves include a first end attached to the shirt body at sleeve body holes and a second end having a sleeve opening circumference. Each of the sleeves includes at least one adjustable member which extends generally longitudinally along at least a portion of the sleeves. The at least one adjustable member is adapted to increase or decrease the sleeve opening circumference.