The pelagic stingray typically grows to  long and  across. The largest individuals on record are from a captive rearing experiment conducted from 1995 to 2000, in which a male reached  across and , and a female  across and .
In terms of size, the pelagic stingray typically falls within the range of and . Notably, the largest specimens documented were part of a controlled breeding experiment from 1995 to 2000, with males reaching impressive dimensions of up to and females measuring widths of up to and 