You’re getting both shirts you see in the photos. Both are lucky brand in size medium.

The shirt on the left has sheared elastic at the neck line the end of the sleeves and at the waist. Pit to pit is about 19.5 inches. Length is about 21.5 inches

The shirt on the right has more of a boxy style. Pit to pit is about 22 inches. Length is about 22 inches.