5"W x 3"H Product Info Sign Holder Library Shelf Label Display | eBay
Amazon.com : 500 Pcs Clear Plastic Tags for Protecting Shelf Label, Price Tag Sign and Ticket Shelf Paper Label Holders for Storage Bins Library Shelf Dividers Markers for Classroom Office (2.5 x
Shelf Markers - Clip-On Plastic Book Supports with Shelf Label Holders