The design, made up of Arabic calligraphy of the word riyal, will be implemented gradually for use in financial and commercial transactions, according to a statement from the country’s central bank. The Saudi riyal has been pegged to the US dollar since 1986 and is set at a fixed exchange rate of 3.75 riyals per $1. The design, made up of Arabic calligraphy of the word riyal, will be implemented gradually for use in financial and commercial transactions, according to a statement from the country’s central bank. The Saudi riyal has been pegged to the US dollar since 1986 and is set at a fixed exchange rate of 3.75 riyals per $1. Economic Times