For the companies listed on the ISE, the standard trading unit or the standard "lot" size is a nominal stock value of TRY 1.   For rights coupons, one lot represents a rights coupon worth TRY 1. 
“Maximum lot amount” which may be entered for a stock at any one time is re-determined every month for each stock to be 250, 500, 1.000, 2.500, 5.000, 10.000, 25.000, 50.000, 75.000 or 100.000 lots.  For orders in excess of the maximum lot amount, order types "Immediate or Cancel", "Special Limit" and "Limit Value" orders should be used, but the size of these order types cannot exceed TRY 1.5 million.