This sign holder is great for displaying A3 signs or posters. The crystal clear holders offer perfect visibility and boasts a double sided display for maximum impact.Easy to use - simply slide the literature in from the bottom and change your sign as required.. Landscape - A3 . Crystal clear holders for perfect visibility. Literature slides in from the bottom to change your signage as required. Double sided display for maximum impact. Wide stable base. Dimensions (mm) H 305 W 420 D 128