CHICOS BUTTON UP SHIRT

Cute canary yellow casual button up blouse from CHICOS. (Sorry about the wrinkles needs to b ironed)Light weight and super comfy, looks cute with jean shorts, perfect at the beach. Worn twice in great condition. Iv never really understood CHICOS sizes but tag says size1 whatever that's supposed to mean lol? I'm just gonna assume it's a small to medium size.