Thank you for your enquiry.
It is almost impossible to determine where the coat will reach on you. We would advise the petite style for you as the sleeves may be too long in a regular fit.
We would imagine the coat should go past your knees as it is a long coat.
Although you would find it difficult to measure yourself, if there is a possibility of measuring a coat you already have, we can compare for you against both fits.
Answered on 12/21/2016
Angelina from Lands End