Hinge Long Sleeve Patterned Blouse

I love this beautiful blouse it simply doesn’t fit me across the chest anymore. It’s in great condition and from a smoke free home. The front it’s a little shorter than the back and you can see the measurements in the pictures along with what it’s made of and the care instructions. It measures 21 inches Pitt to pit. I’m not sure if it’s a large or a number one. I typically wear larges, so that’s what I am listing it as.