Does the trick!

Cannot believe Woo Commerce doesn’t report product variations (eg t-shirt sizes) out of the box. And because I run a very small business (sportivaevents.co.uk) I can’t afford $50 a month for some fancy reporting system as t-shirt sales are just a minor sideline anyway.
Installed and it worked which at this stage is all there is to say. Be more confident if it had more reviews & more recent updates so I’m adding my review now.