This T-shirt features glow-in-the-dark printing that collects sunlight and glows in the dark on the yellow printed areas. The firefly's tail lights up, making it easy for children to be seen in the dark, which is convenient. The design is also cute, making it perfect for parent-child or matching outfits. Since my child has outgrown the size, I'd like to sell the adult size together. I'm not considering selling them separately. Adult size: Unisex M Child size: L (120-130 cm) Please check the actual measurements below. Glow-in-the-dark firefly T-shirt Insect Collection INCECT COLLECTION Color: Black Adult size measurements (with chest pocket) Width: approx. 54cm Length: approx. 70cm Shoulder width: approx. 51cm Sleeve length: approx. 16cm Child size measurements Width: approx. 35.5cm Length: approx. 42cm Shoulder width: approx. 30cm Sleeve length: approx. 11cm 100% cotton (10% organic cotton used) The adult size is a relatively large, oversized fit. It's a size that men who usually wear L can wear. It's unisex, so women can also wear it for a stylish, oversized look. Instant purchase is OK. I couldn't find any noticeable stains, dirt, or tears, but it's a used item for personal use, so please check the photos carefully and understand before purchasing. Please refrain from purchasing if you are sensitive to used items. It will be shipped via Mercari delivery. The price includes shipping. It will be shipped compactly. Please understand that there may be some wrinkles from folding. If you have any questions, please feel free to comment.