Lamb leather Walter Baker biker jacket

It was already a bit too big on me when I bought and I’m even smaller now. The colour is very flattering. There’s no size tag — I’m guessing it’s medium, maybe even large, but I’m not sure, sorry. I got it at a consignment store. The only flaw I can see is the two small dots in that last pic, but they’re hidden in both ways of wearing the jacket.