Braces for immobilizing clavicle fractures in infants may include a garment of fabric sized and shaped to extend around a torso and along at least one arm of an infant. The garment may include a first closure configured to secure the garment around the torso of the infant, a second closure configured to secure the garment over a shoulder corresponding to a fractured clavicle of the infant, and a sleeve configured to extend around an upper and lower arm of the infant on a same lateral side of the garment as the second closure. The sleeve may include at least a third closure configured to secure the sleeve around the upper and lower arm of the infant. A portion of the sleeve may be affixed to a portion of the garment, the portion of the garment to which the sleeve may be affixed being located over the torso of the infant when the garment is secured around the torso of the infant.