This is a Mock neck big T-shirt from Casper John (キャスパージョン). It's size S. I put it away after purchasing it without wearing it. Thank you. [Mock neck big T-shirts] ◆ Material Properties: This versatile summer T-shirt uses a cool ponte fabric that is both thick and stretchy, making it resistant to wrinkles and easy to care for, allowing for repeated wear. ◆ Silhouette: A moderately loose silhouette. It's easy to use as an inner layer and has a moderate presence, making it stylish even when worn alone. It's a silhouette that allows for a wide range of outfits. ◆ Design Details: The low and loose mock neck creates a calm, mature impression while also providing comfort. Combined with the beautiful material, you can achieve a fashionable look even with just a T-shirt.