Is 17.5 ml equivalent to a half ounce or an ounce

17.5 ml is roughly one half of an ounce because there are 29.5735296875 ml in one fluid ounce.

So, 17.5/29.573529 is 0.5917453947807501 ounces, so about half an ounce.

0.5917453947807501 oz

So a little more than half an ounce.