Ooo, thanks for this. I just ordered a small (from you!), and the measurements for the small didn't seem quite right, from comparison photos with other cups. Quite a large small, since it's halfway between the smalls and larges of other cups.

Thank you for your order :-) I have emailed them about the sizes, I am just waiting for a response.

This was the response, it seems like they are sticking by their measurements.
Were you able to find the email we sent you the last time you asked about the measurements?

As we explained in that email, the measurements we have are as contained in the CAD drawings produced by the design firm that made the Cup.

We will be unable to change the measurements we have to any other measurements other than what is contained in these CAD drawings.

Because these measurements are taken with engineering grade tools and not kitchen or household measuring cups or pastry measuring cups or hospital syringes.

We receive on a regular basis measurements from women from all over the world regarding our cups. Everyone has their own measurements of what our cups are. None of these is based on any engineering grade design tools and thus may be plus or minus our measurements by the minutest millimetres which only these engineering tools will detect. Kitchen and household measuring jugs etc are not suitably calibrated to detect this.

If we change our measurements every single time we receive measurements from these blog or YouTube reviewers, it means we will be changing measurements everyday.

We will be unable to change the measurements we have for the cups to anything other than what we have in the CAD drawings as sent to us by the design firm.

I hope you can find the last email we sent you explaining this because it contains also a detailed explanation on this.

Huh. I guess they don't want to do their own measurements? CAD drawings may not translate exactly to real life. Oh well, at least they have a logic behind it.