The sizing by numbers, eg 12/14 I ordered fro my wife, does not correspond to what the traders have on their Amazon page and on their system. We received a size 16/18 as large from one company and then was told to to order medium and a 10/12 arrived today ( called medium) Bearing in mind I wrote to check the actual size by numbers each time before ordering and they all got it wrong, I would suggest ordering at least two sizes and return the one that isn't right. Good luck as even Amazon couldn't help me when I involved them. This is my first EVER problem with Amazon by the way who are normally great.
email from the actual supplier to them all below:
We have changed our sizes this year. A medium was a size 10-12 & a large was a size 12-14 but now the sizes have changed a medium is a size 12-14 & a large is a size 16-18.
So depending on what stock they have (original sizing or new sizing) this could be the reason for the confusion.
Fun Shack (UK) Ltd