These sign clip holders are sold as a set of 100 units. Please keep this in mind when placing an order. The sign clip holders are made up of 2 clear acrylic clips paired together using a plastic ball joint knuckle. This gives you the ability to tilt or rotate signage in any direction. The clip-on memo holders are designed for attachment to an edge, such as a shelf or a basket display. Typically the sign clips are found in retail settings; however they can be used anywhere signage is needed and countertop space is limited. The maximum open area for each clamp is 0.375 inches wide. When closed, the clips have an opening of 0.1875 inches wide. The entire unit measures 3.5 inches tall.