Expand their imagination with Crayolas So Big Extra Jumbo Crayons. Crayola crayons offer a true-to-life color experience, in sizes that fit every childs hand to keep creating. Crayola So Big Extra Jumbo Crayons are 25% larger in thickness and size than classic crayons, making them stronger and more durable when coloring. Ideal for small hands, kindergarten and/or primary school use.