Configuration device for Cyclone V

Hello,

I am searching for suitable configuration device for Cyclone V E A9 FPGA. According data sheet the *.rbf file will have size of 102,871,552 bits. Could I use for example S25FL256SAGMFIG01 (256Mb 3V 133MHz Serial NOR Flash) or I need 512 Mb device? My application is cost sensitive, so I need something really cheap.

Thank you!