J. Crew Crewcuts Secret Wash Button Down Shirt

J. Crew Crewcuts boy’s secret wash button down shirt in neon gingham! White and neon green/yellow color. There is a line that goes along the entire width of the shirt on the back near the bottom hem, I don’t know what it’s from. It looks like a weird factory flaw, I’m not even sure if it’s a stain. See photos! Size 8, chest measures 16” across lying flat, sleeves-14 3/4”, length-23”! 7 175 4