White J Crew Factory Dress Size 4

This dress is a size 4 and true to size. I'm 5'0" and this dress came down to right above my knees. I can get exact measurements upon request. I've worn this dress 2 times and it's been in my closet ever since, and it is still in good condition. The clasp and zipper work perfectly, and there are no snags that I could find. However, there is some discoloration in the armpits that I'm not sure where they came from. I've included close-up pictures of the armpits for reference.