A foot-supporting appendage of a wearable robotic exoskeleton configured to support a foot of a user wearing the robotic exoskeleton. The foot-supporting appendage can include a rearward support configured to support a hind foot portion of a foot of the user. The foot-supporting appendage can further include a frontward support configured to connect to the rearward support and configured to support a forefoot portion of the foot of the user. A size of the foot-supporting appendage is adjustable to accommodate a respective foot of a user of a plurality of users having different sizes of feet.