If you are doing a simple flush - 1 of the 32oz (big) bottles should be fine. If you have any mishaps (need to bleed extra or redo a corner) though you'll want more.
Since brake fluid is cheap I usually just buy 2 of the 32oz bottles. If I only use 1, either take it back or keep it to use later.
Since brake fluid is cheap I usually just buy 2 of the 32oz bottles. If I only use 1, either take it back or keep it to use later.