Sew custom-fit swimsuits for girls with our PDF sewing patterns. Our collection includes one-piece swimsuits, tankinis, rash guards, and swim shorts designed for active kids. Each instant download pattern features detailed instructions with color photos, plus options for different coverage levels, strap styles, and fit variations. Create swimwear that actually fits - adjust rise, leg openings, and coverage for growing girls. Choose fun fabrics in her favorite colors and prints, add UPF protection, and make swimsuits tough enough for pool and beach adventures. Whether you need practical swim suits for lessons, modest coverage options, or cute styles for vacation, find patterns for every skill level. Download your pattern and start sewing swimwear today.
Finding girls' swimsuits that fit well and provide appropriate coverage is challenging. Store-bought swimwear is expensive, wears out quickly, rarely fits growing bodies properly, and offers limited coverage options. When you sew girls' swimsuits, you create durable pieces that fit perfectly, provide exactly the coverage she needs, and feature fun fabrics she'll love. Customize rise and leg openings for comfort, adjust straps for proper fit, add UPF sun protection, and make swimsuits tough enough for active swimming, diving, and play. From practical one-pieces for swim lessons to cute mix-and-match pieces for vacation, sew swimwear she'll actually want to wear.
One-piece swimsuits: Full-coverage swimsuits perfect for active swimming - tank styles, athletic cuts, and fun designs that stay in place during play.
Tankini sets: Two-piece swimwear with tank-style tops and coordinating bottoms - more coverage than bikinis with the convenience of separates.
Rash guards: Sun-protective swim tops - long sleeve or short sleeve options perfect for extended water play and sun safety.
Swim shorts: Board shorts or swim shorts that pair with tankini tops or rash guards - active coverage for water sports.
Modest swimwear: Higher necklines, longer coverage, and fuller cuts for families seeking more modest options.
Girls' swimsuits require proper fit to stay in place during active play. Negative ease: Like adult swimwear, girls' patterns are designed smaller than body measurements because swim fabric stretches. A properly fitting swimsuit feels snug when dry but stretches comfortably to fit. Too loose when dry means it will be baggy and unflattering in water. Key measurements: Chest, waist, hips, and torso length (shoulder to crotch for one-pieces). Growing bodies: Girls' proportions change as they grow. Young girls are relatively straight through torso, while older girls develop curves requiring different fit. Adjust patterns as needed for individual body types. Active fit: Swimsuits must stay in place during swimming, diving, jumping, and playing. Proper fit prevents wardrobe malfunctions and keeps girls comfortable and confident in water. Test fit by having her move around - if swimsuit shifts or gaps, adjust before finalizing.
Swimsuit fabric (swimwear knit): Nylon-spandex or polyester-spandex blends with 4-way stretch and at least 50% stretch in both directions. Quality swim fabric resists chlorine and saltwater, dries quickly, provides UPF sun protection, and recovers well (returns to shape after stretching). Never use regular knit fabrics - they won't hold up. Swim lining (swim power mesh): Essential for modesty and support - provides coverage in bust and crotch areas, helps swimsuits hold shape, and adds durability. Fold-over elastic (FOE): Specialized elastic for finishing edges - stretches with fabric, lies flat, and doesn't dig in. Typically 5/8" width in colors to match or contrast with fabric. Clear elastic: Used for support in straps and structural areas without being visible. UPF fabrics: Many swim fabrics offer built-in sun protection - important for extended water play. For quality swimwear fabrics and supplies, visit our sister site KnitFabric.com's swimsuit fabric collection.
One of the best reasons to sew girls' swimwear is customizing coverage. Necklines: Choose from high neck (maximum coverage), scoop neck, or tank styles. Adjust how much chest/shoulder shows. Back coverage: Make backs higher or lower based on comfort and modesty preferences. Leg openings: Adjust leg height - lower for more coverage, higher for sportier look. Customize to prevent riding up or gaping. Bottom coverage: Full coverage, moderate, or athletic cuts. Many families prefer fuller coverage for young girls. Torso coverage: Lengthen one-pieces for more coverage or create tankini-length tops that provide tummy coverage. Arm coverage: Add short sleeves or long sleeves (rash guard style) for sun protection and modesty. Layering options: Pair rash guards with swim shorts for maximum coverage while swimming. Mix and match tops and bottoms for customized modesty levels. Store-bought girls' swimwear offers limited coverage options - sewing lets you create exactly what your family wants.
Girls are hard on swimsuits - they need to survive pools, beaches, diving, and rough play. Quality construction: Use proper swim fabric (not regular knits), reinforce seams at stress points (crotch, straps, leg openings), and use quality thread that resists chlorine degradation. Strong seam finishes: Serge or use narrow zigzag on seams. Double-stitch high-stress areas like crotch seams. Proper elastic application: Securely attach FOE and clear elastic - loose elastic means swimsuit won't last. Quality materials: Invest in good swim fabric and elastic - cheap materials fall apart quickly. Lining in key areas: Full lining in bust and crotch areas adds durability and prevents see-through issues. Chlorine resistance: Quality swim fabrics resist chlorine damage better than cheap fabrics. Rinse suits after each use to extend life. Realistic expectations: Even well-made swimsuits wear out with heavy use - but quality handmade suits often outlast cheap store-bought versions.
One-pieces are the most popular girls' swimsuit style. Why girls love them: No wardrobe malfunctions during active play. Stay in place while diving, swimming, and jumping. No worrying about tops riding up or bottoms falling down. Parents appreciate the coverage and security. Style variations: Tank styles with different strap widths, cross-back or racer-back for athletic swimming, fun details like ruffles or cutouts, or color-blocking and patterns. Strap options: Adjustable straps grow with her, wide straps provide secure fit and sun protection, or fun strap details add personality. Practical features: Full lining for modesty and support, comfortable leg openings that don't ride up, proper torso length that doesn't pull or bag. Swim lessons: One-pieces work best for swim lessons - no slipping or shifting, instructor-approved for safety, and girls can focus on swimming rather than adjusting suits. Make multiple one-pieces in different colors and prints - she'll wear them constantly during swim season.
Tankinis offer the best of both worlds - coverage with convenience. Why tankinis work well: More coverage than bikinis while maintaining bathroom ease. Tops and bottoms can be different sizes (common for growing girls). Mix and match for variety - make 2 tops and 2 bottoms for 4 different looks. Top lengths: Longer tankini tops provide tummy coverage, shorter styles are sportier. Adjust length to family preferences. Bottom options: Pair with swim shorts for maximum coverage, hipster bottoms for moderate coverage, or skirted bottoms for extra coverage and twirl factor. Rash guard combinations: Long-sleeve rash guard tops paired with swim shorts create full-coverage active swimwear with sun protection. Practical advantage: Easier for potty breaks than one-pieces - important for young swimmers. Girls can dress themselves more easily. Cost-effective: Making separates lets you replace just the piece that wears out or gets too small rather than replacing entire swimsuit.
Protecting kids' skin from sun damage is crucial. UPF swim fabrics: Many swim fabrics offer built-in UPF (Ultraviolet Protection Factor) sun protection - typically UPF 50+. This blocks 98% of UV rays. Rash guards: Long-sleeve or short-sleeve swim tops provide extensive sun protection - cover shoulders, arms, chest, and back. Essential for extended water play, beach days, and tropical vacations. Coverage = protection: More fabric coverage means more sun protection. Full-coverage one-pieces, long-sleeve rash guards, and swim shorts all reduce sun exposure. Color considerations: Darker colors generally provide better UV protection than light colors. Practical benefits: Beyond sun protection, rash guards prevent chafing from life jackets and protect skin during water sports. Style options: Rash guards don't have to be boring - make them in fun prints and colors girls will actually want to wear. Pair with coordinating swim bottoms or shorts.
Girls grow fast, especially during swim season. Adjustable straps: Tie straps or adjustable strap hardware extends wear as she grows taller. Can adjust length throughout season. Stretchy fabrics: Quality swim fabric with good stretch accommodates some growth. Choose fabrics with excellent recovery. Sizing strategies: Some parents size up slightly at start of season so suit fits all summer. Others make suit to fit now and make new one next year. Strategic design: Higher-cut legs accommodate growth better than low-cut legs. Full-coverage bottoms work longer as girls grow. Realistic expectations: Swimsuits have less growth accommodation than regular clothes due to fitted nature. Expect 1-2 seasons of wear typically. The lower cost of handmade suits makes replacing them each season affordable. Practical approach: Make 2-3 suits at start of season in current size. If she outgrows them mid-season, make new ones in larger size - still costs less than buying.
Store-bought girls' swimwear creates multiple frustrations. Quality swimsuits are expensive ($30-60+ per suit) for clothes that get heavy use and wear out quickly. Nothing fits properly - torso too short or too long, straps don't adjust right, leg openings gap or bind. Coverage options are limited - difficult to find modest swimwear for families who want more coverage. Cute prints and styles sell out quickly in popular sizes. Quality is often poor - thin fabrics, cheap elastic, construction that doesn't survive chlorine and active play. When you sew girls' swimsuits, you get perfect fit for her unique proportions, exactly the coverage level you want, quality fabrics that resist chlorine and last, fun prints in colors she loves, proper construction that survives active swimming, and ability to make matching sibling suits. Cost savings are significant - handmade girls' swimsuits cost $8-20 in materials compared to $30-60+ store-bought. Make 2-3 suits for the price of one store-bought. Plus handmade suits often last longer with better materials and construction. For girls with tall, petite, or athletic builds, sewing often provides the only way to get properly fitting swimwear.
Take accurate measurements - chest, waist, hips, and torso length. Use ballpoint needles designed for knit fabrics and change frequently. Use narrow zigzag or stretch stitch - never straight stitch on swim fabric. Test stitches on fabric scraps and adjust tension. Don't stretch fabric while sewing - only stretch elastic when applying it. Practice applying fold-over elastic on scraps before working on actual swimsuit - this technique takes practice. Use quality swimwear fabric with good recovery - cheap fabric stretches out quickly. Always line bust and crotch areas for modesty and durability. Try on during construction to check fit - easier to adjust before finishing. Reinforce high-stress seams like crotch and straps. Consider making test suit in cheap fabric to perfect fit first. Use quality thread that resists chlorine degradation. Let her choose fun fabrics - she'll wear suits she helped create. Make multiple suits in different styles for variety. Rinse suits after each use to extend fabric life. For detailed swimsuit construction tutorials, visit our sewing blog for comprehensive guidance.
How long does it take to sew a girls swimsuit?
Simple one-piece suits take 2-4 hours. Tankini sets take 3-5 hours. Rash guards are quicker, around 1-2 hours. Your first swimsuit takes longer as you learn techniques like FOE application.
Is sewing swimwear hard for beginners?
Swimwear requires some sewing experience, especially with stretch fabrics and applying elastic. If you can sew basic knit garments, you're ready to try swimwear. Start with simple styles.
Can I use regular knit fabric for swimsuits?
No - swimwear requires special swimsuit fabric that resists chlorine, saltwater, and sun damage while providing proper stretch and recovery. Regular knits will stretch out and deteriorate quickly in water.
How much fabric do I need?
One-piece girls' suits need 3/4-1.5 yards of main fabric plus lining depending on size. Tankini tops and bottoms each need 1/2-3/4 yard. Rash guards need about 1 yard. Each pattern includes detailed yardage charts.
Do I need a serger to sew swimwear?
No, though it's helpful. A regular sewing machine with zigzag or stretch stitch works fine. Use ballpoint needles and appropriate stretchy stitches.
How do I make modest swimwear?
Choose patterns with higher necklines, add longer sleeves (rash guard style), lower leg openings, add length to tops and bottoms, or create swim shorts to pair with tankini tops. Sewing lets you customize exactly the coverage you want.
Will handmade swimsuits hold up to pool chlorine?
Yes, if you use proper swimsuit fabric and construction. Quality swim fabric resists chlorine. Rinse suits after each use and they'll last well. Handmade suits often outlast cheap store-bought versions.
