A standard size is a ready to wear size such as 38 or M. It stands for one column of a size chart, not for a particular body.
Which size a digitized pattern actually is only becomes clear from its measurements. A number written on the paper is a claim, the measured file is the fact.

Digitize sewing patterns without tracing.
Test PatternScan Pro free for 14 days with the full feature set. You need your smartphone, a printer and one pattern you always wanted digital.