Girls' One-Piece Swimwear

Use the brand-specific size chart and measure chest, waist, and height; if between sizes, choose the larger size for growing children or if the suit feels tight across the chest or shoulders

Most one-piece swimsuits are made from blends of nylon, polyester, and elastane (spandex); polyester tends to resist chlorine and fading better, while higher elastane content increases stretch and a snug fit but may degrade faster with chlorine exposure

Look for swimsuits labeled with UPF ratings; UPF 50+ blocks about 98% of UV radiation and offers stronger sun protection than unlisted fabric, but sunscreen should still be used on exposed skin

For active swimming choose suits with secure straps (crossback or racerback), higher neckline and full coverage bottoms for freedom of movement; for casual wear, you can prioritize decorative details like ruffles or cutouts but expect less performance support

Rinse with cold water after each use, gently hand wash with mild detergent, avoid wringing or bleach, and lay flat to dry away from direct sunlight to minimize fading and fabric breakdown

Prices vary by brand and features; budget options commonly fall under $50, mid-range suits are often $50–$80, and premium or specialty pieces can be higher

Select styles with higher necklines, longer torso cuts, or adjustable straps for fit customization; check measurements for torso length and consider brands that list torso or rise measurements if a longer fit is needed