The mask I ordered was a medium, on the package it said medium but when I opened it it was a small medium, S/M. Fortunately it does fit albeit a bit small. Not a great experience especially as on the package it says, no refunds once the package is opened, unless faulty. Also the address was incorrect on the package. On the invoice my address and box number is shown correctly as 5013, but on the package it was just 50. Fortunately the PO staff realised the mistake and put it in the correct box. I can send photos of the invoice, package address and the mask if required.