Rounded Corner Rectangles: Rounded corner rectangles are labels with rounded corners on the die size. The corners of the label have a smooth, curved shape rather than sharp angles. This creates a softer appearance for the label.  Square Corners: Square corners refer to labels with squared-off corners on the die size. The corners form perfect 90-degree angles, creating a clean and sharp look for the label.  Both rounded corner rectangles and square corners have their unique visual characteristics, and the choice between them depends on the desired aesthetics and brand identity for your labels. Rounded corners tend to create a modern and friendly feel, while square corners offer a more traditional look.