Designed by a 3'9" woman who never found a swimsuit that fit.
Most swimwear is drafted on a 5'10" fit model, then graded down. The straps land wrong. The bottoms ride high. The cup hits the collarbone. Petite Riviera starts at the other end. Every cut is patterned on a small frame first, then graded up to the standard sizes. The math is the same; the starting point is what changed.
The look is the Riviera in its golden decade. Bardot shoulders. Polka and gingham. High-waist bottoms that sit at the natural waist, not four inches above it. Halter ties that hold without cutting. Cabana stripes you can throw a linen shirt over and walk to the bar.