Leather jacket, women's, sheepskin, riders jacket

Thank you for viewing.
I purchased this in Korea.
The leather is soft and light, so I feel it's not heavy and doesn't make me tired when I wear it.
The size is Korean size 66.
I looked it up and it seems to be a Japanese size L, but it feels more like M.
I don't think it would feel too big even for someone who wears size S.
Please refer to the measurements I took, although they are approximate.
The button on the left sleeve fastens, but it comes undone easily. Other than that, I don't think there are any noticeable stains or scratches. I have only worn it about 3 times and have kept it stored at home.