This shirt I purchased in grey for my Lab/Pit Bull mix. He actually wears a 4x in this type of tee. I am going to gift it to my aunt as she has a Labradoodle (Lab/Standard Poodle) that this shirt will most likely fit.
Such a cute little singlet! Looks gorgeous on my Shih-Tzu girl, however the sizing is I would say a very small fit, if your needing say a small I would get a medium. Great quality material, design printed perfectly.