Algebraic Tiles A) x2, x, 1 B) - x2-x, -1 All tiles in three sizes. Mead in Plastic sheets 1) x2 and -x2 in same size, 50mm. x 50mm. 5tiles in blue colour and another 5 in red colours. 2) x and -x in same size, 50mm. x 10mm. 10 tiles in blue colour and another 10 in red colours. 3) 1 and -1 in same size, 10mm. x 10mm. 20 tiles in blue colour and another 20 in red colours. Packed in plastic box.