Navy is Uniqlo size 100, black is Nishimatsuya size 110, gray is Nishimatsuya size 100. Not sold separately. As you can see in the photos, the Uniqlo size 100 is made larger and is almost the same size. The Uniqlo fabric is slightly thicker, and it was comfortable to wear with an undershirt in early spring. Nishimatsuya fabric is like Heattech. They have been worn and have some pilling. I will give them to someone who understands they are used items. *I have added a gray Nishimatsuya size 100 in photos 4 and 5. The price remains the same for the set of 3. - Color: Navy, Black, Gray - Size: Navy 100, Black 100cm Gray 100 - Material: Cotton, Polyurethane - Material: Polyester, Rayon, Polyurethane Thank you for looking.