Christmas Hand Warmers - Red/White Christmas Trees Christmas Hand Warmers - Red/White Christmas Trees £3.00 Quantity: at £3.00 each Add To Basket 1 in stock. Pretty little reusable hand warmers, perfect for the school run. Just pop them in the microwave for 15-20 seconds to warm them up. Approx. 9cm x 9cm, wrapped in a jute cord with instruction label. Please make sure they are totally dry before warming.