According to my research on ChatGPT, the RN number indicates that this item is from Sears. However, I cannot confirm the authenticity. The item itself is very sturdy and of good quality. This is a long-sleeved shirt from Sears' casual line, "Specialty Collection." It has a 90s vintage feel and a relaxed silhouette, making it easy to incorporate into modern outfits. There is some wear and tear, but no noticeable stains or damage. Size: M Material: Cotton Length: Approximately 81cm Width: Approximately 57cm