This large BS 5252 Fan from the British Standards Institute contains 234 colour patches 64mm x62mm, three to a leaf. 297mm by 63mm. BS 5252, incorporates derived standards such as those for paints (BS 4800), vitreous enamel (BS 4900), plastics (BS 4901), sheet and tile flooring (BS 4902). Please note this does NOT include BS 381C colours)