Clothing manufacturers have been asked by the government to produce 500,000 more yellow shirts commemorating His Majesty the King's diamond jubilee anniversary to meet huge demand from the public.

The shirts will be available at big supermarkets such as Big C, Macro and 7-Eleven convenient stores nation-wide.

Siriphol Yordmuangcharoen, director general of the Department of Commerce, said he met with 15 major garment makers and decided to produce standardised, commemorative yellow shirts.

The shirts will have three types of fabric including cotton and PVC. Prices will range from Bt200 to Bt250.

Siriphol said some 20,000 shirts would be available by next week and shops selling the merchandise had promised not to mark up the price. Although the initial run will be 500,000, more could be made if the demand outstrips supply.

Some 10,000 people who earlier requested shirts from the department, would be able to pick up their shirts by Wednesday.