POLO RALPH LAUREN Polo Ralph Lauren Men's Long Sleeve Check Shirt One Point Pony - Free Shipping The size is indicated as M, but it also states 15 1/2 for the neck and 39 for the sleeve length, and 89 for the length. It is a Japanese size M, but I think it is made slightly larger. Ralph Lauren's "Custom Fit" is a fit name applied to shirts and polo shirts with a slimmer, body-fitting silhouette than the traditional "Classic Fit." It's slimmer than the Classic Fit, but it's considered to be a size that's a little more relaxed than the slimmer "Slim Fit" or "Custom Slim Fit," just about in the middle. Size...M Color...Blue系 (Blue-based) Stains, tears, odors, etc....None