Five by five blue womens jersey size medium nwot v-neck

Five by five blue womens v-neck jersey size medium. This was only worn one time. I just looked on the inside of the shirt down at the bottom and saw the spot pictured above. Should come out in wash. My measurements: Length from bottom of the V to the bottom of the jersey is 14 inches Length from the back of neck to the bottom of jersey is 22 inches. Sleeve length- 9 1/2 inches