Project options - external memory size

Under the project options - target - external memory section, does the 'size' field represent 8-bit or 16-bit values; and does the external bus mode play a part in specifying this value. For example, if I'm using a 16-bit non-mux'd data bus, with a 32Kx16 SRAM at some address, should the size for that SRAM be spec'd as 0x8000 or 0x10000?

Thanks.

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