This letter tiles for cinema light up sign can apply to 3-row A4, 4-row A3 and 2-row A5 light box. Notice: 3-row A3 and 3-row A5 light box are not fit. Can be used at shop, cafe, restaurant, hotel lobby, corridor, exhibition hall, home, ect. Note: NOT included the light box Letter Tiles Type Letter Tiles for Cinema Light Up Sign Material Acrylic Size 35.4mm * 65.4mm Thickness about 0.37mm - 0.40mm Style Arts & Crafts/Mission Style Colour Multi Features Custom Made Theme Letter Box Shape Rectangle Type Letter Tiles for Light box Brand Unbranded/Generic MPN TJ4894670082574 .