Size tag is missing, please see pics for exact measurements. I tried it on and I would estimate it being a small.

This is a vintage Patagonia Synchilla jacket in black, size small. Made in the USA, it features a polyester outer shell with a fleece fabric type and a stand-up collar accentuated in gray tip. The jacket has a full zip closure and a mid-length bomber style, suitable for winter, fall, and spring. Perfect for outdoor activities like walking, hiking, and running, it offers a classic look with a regular fit.