Gorgeous 1960s Peck‎ and Peck mini Coat/Dress XS

This piece is absolutely gorgeous and is almost big enough for me. Alas, it is a little tight in the bust and so I must let it go. I found it at an estate sale filled w/ gorgeous vintage designer pieces, but this one stood out! Wear as a top layer or as a dress. It buttons halfway down & the large orange buttons are not originals. There are two tiny spots under the lapel and a small water stain on the lining, The result of my spot cleaning the lapel (possibly fixable) See photos for measurements