Anyone good at sizing stuff? What would 50'' bust be in a top?

[alltoomuchrightnow]

Selling a top that is labelled as Medium but it's definitely an oversized medium, as armpit to armpit measures 25 inches.
What does this roughly translate as if not wearing it as a deliberate oversize?
eg UK 22 , 24 etc

A quick Google suggests it would be a UK 24 in most places.

You could find a similar style top on somewhere like Boden which goes up to size 22 and compare the measurements with your top.

thanks a lot