A sign holder includes a sign sleeve having a width and being defined by a viewing flange, a base flange and a first joint that couples the viewing flange to the base flange. At least one protruding member has a width and is coupled to and extends from the base flange at an at least one second joint. Each protruding member includes a leg portion and at least two hook portions coupled to the leg portion at an at least one third joint. The leg portion is oriented relative to the base flange by a first angle and each hook portion is oriented relative to the leg portion by a second angle. The width of the sign sleeve is greater than the width of the at least one protruding member.