PRETTYGARDENWomen's Short Sleeve Casual T Shirts Summer Ruffle Plain Round Neck Loose Fit Tee Blouse Tops

It this more if a t shirt with cute sleeves or more of a blouse type of top?

About this prettygarden short sleeve blouse top, if i wear 12 what size i must buy? medium or large. does medium runs big? i am confused

Is the white see thru?

I am 5'6" & 116 lbs, small boned, usually wear a M because I don't like tight fitting clothes, what size should I get?