Kids learn letters, the alphabet and how to form simple words with these large, stackable block letters that build fine motor skills. The colorful block letters feature flat fronts and open backs for dual use as letter molds. The set includes 2 sets of vowels (in the same color) and a storage bag. Individual letters are approximately 1.5 in high. Size: 30.5 x 30 x 4.3 cm. For ages 18 months and up.