That's a crop top with a floral print!
Here's a description of its key features:
• Style: It's a cropped blouse, meaning it's short and designed to expose the midriff.
• Fabric and Pattern: The fabric is white with an all-over floral pattern. The flowers appear to be mainly a deep red/maroon color, with smaller accents in a light blue/teal.
• Sleeves: It has long sleeves that are quite full or puffy. A distinctive feature is the shirring or smocking along the length of the sleeves and at the cuffs, which creates a gathered, ruched, or ruffled effect.
• Torso: The body of the top also has shirring or smocking along the bottom edge (which would be the hemline) and possibly at the top edge, giving it a snug, stretchy fit through the bust and waist area.
It has a very romantic, girly, and summery aesthetic.