Cactus Letter Holder - Green Green Cactus Letter Holder - Funky stationary holder from the j-me Design Studio. If you want to make a bold, funky statement with your letter rack then this has to be for you! The Cactus Letter Holder, this one in green, is a design classic from the J-Me design studio. The Cactus Letter Holder will look equally good in the home or office and is a colourful and practical way to liven up your desk. It measures approx 16.6cm x 15.2cm x 6cm.