Mystical Magical Rainbow Prism Border. You will love this Mystical Magical Rainbow Prism Border! The bright colors and playful design are sure to trim any bulletin board or school display in style. Perfect for any setting, including at a school, daycare, office, church, college dorm, employee break room, or senior living residence. Measures 3" wide and includes 35' per pack.. Specifications Weight: 0.3 lbs; .