Can I send you an existing garment I have that I know fits me properly?

No.

We are very good at interpreting the measurements inserted following our video tutorials and we  have developed even more experience with each new client.

On the other hand, we are not good at all at copying other tailors measures. Furthermore there are tecnical and stilistic features that cannot be guaranteed by just replicating the same measures.

Should you have any doubts regarding the output of your commission, our policies have been made to protect you and guarantee you the best fit possible, and in case you're not satisfied you'll get a full refund.
You can find further info here