Pet Shirts Printed Puppy Shirts Dog Sweatshirt Cute Dog Clothing Dog Pullover Soft Shirt for Pet Dog Apparel Christmas New Year (S)

My puppy size is a small, but the back says she is a medium, the size is only a couple inches shorter. Wouldn't that mean she is pretty much a small?

will a small size fit a 6lb chihuahua?

Are these made in the USA?

What size for a frenchie? M or L? She’s 20 lbs