Kate Greenaway True vintage 1950s/60's dress woman riding horse, Size 12

Description

Nice vintage Kate Greenway dress.  Likely from the 50's/60's.    I think the side with the buttons is the front.  I could be wrong.
Acceptable condition.  There is a good amount of age related stains, basically yellowing of the white material.  Might be difficult to pick up from the pictures, but it is present.  I'm not sure if this is something that comes out when washed and/or treated.  Since it has been in storage for many years, it has a storage smell and should be washed prior to usage.  Otherwise, no rips or holes.  Please be okay with condition issues prior to bidding.  I am selling in "acceptable" condition, so there are condition issues.
Size 12  (I'm thinking this is a girls item, since if this was a woman's size 12, I think it would be much larger.  Just in case, please review all measurements closely.
pit to pit: 16"
shoulder to bottom front:  34"