Milliard Baby Orca Whale Floating Pool Thermometer, with String, for Outdoor/Indoor Swimming Pools, Hot Tub, Spa, Jacuzzi and Pond Thermometer is 7 tall and reads in both F and C. Includes rope tether to keep the thermometer from floating away. Whale-shaped top adds fun and dcor to your pool. Made from durable ABS plastic to last from season to season.