increase select-option visible length

Hi Experts,

i have created one report, in selection screen we have a select option as .

SELECT-OPTIONS: S_PRCTR FOR PRPS-PRCTR.

where as length for the field is 10, but visible length is only till 6,but it is allowing more than 10 letters to enter,

the problem is if we enter as BILLING AREA IN SELECT OPTION we can see only till BILLIN the other letters are hiding how to see the 10 letters in select option with out hiding.

searched in forum but i couldnot get the answer.

please help

thanks in advance.