Features an impressed upper case letter on each tile so children can feel and see the shape of the letter. The corresponding hand sign is on the reverse side. The tile set can be used by parents and teachers to play fun games with their kids while teaching them about sign language. Manufacturered by PlanToys. Each tile measures 2.6 x 3.2 x .4 inches. Recommended for ages 2 years and up. Sustainably crafted from chemical free rubberwood trees formaldehyde-free glues organic pigments water based dyes and safety tested 26 piece set highlights the American hand sign language for each letter of the alphabet.