Clear Acrylic Sign Holder with Header for 8.5x11 Suggestion Box Mount for Graphics. This holder enhances your box by showcasing signage. Crafted from 3mm clear acrylic, designed for 8.5x11" graphics. Total dimensions are 13.5x8.5x0.51". Includes two predrilled holes at the bottom for fastening with two 0.24" diameter holes, spaced 6.42" apart. Package includes two 0.5" M5 wood screws and two drywall nuts.