The front says "Net Contents: 16 OZ". Next time I buy a new bottle, I plan to weigh it.
The directions for use says to add "one-half (1/2) ounce of Leisure Time Sodium Bromide for every 100 gallons of spa water" - full stop.
Strange and confusing indeed. Normally I wouldn't question it, but because they did not state the equivalent measurement in teaspoons or tablespoons, I called the 800 number.