Somewhere between the last of the little-kid swimsuits and the first young womens' styles, there's a stage that's surprisingly hard to shop for. Pre teen girls are growing quickly, getting more opinionated about what they wear, and often feeling a little self-conscious for the first time.
If you're searching for the best swimwear for pre teens, here's what actually matters, and how to find a swimsuit she'll want to wear all holiday.
What Makes the Best Swimwear for Pre Teens?
The best pre teen swimsuits aren't just smaller versions of adult styles. They are designed specifically for the needs of growing girls. Look for:
- Age-appropriate coverage | a full-coverage one-piece is a popular choice because it feels secure and comfortable for swimming, running around and beach days.
- Removable age-appropriate inserts | these give a little extra coverage and support as her body starts to change, and she can take them out if she prefers.
- An adjustable fit | tie-back and halter styles can be tightened or loosened, so the same swimsuit keeps fitting through a growth spurt.
- Quality, forgiving fabric | soft, double-lined fabric with UPF50+ protection holds up to sun, salt and chlorine. It also needs to be very forgiving, so it sits smoothly and comfortably on every body shape. That's exactly what TAG•V SWIMWEAR fabric is designed to do.
- Inclusive Sizing | every girl grows differently, so sizing should work for her shape, not just her age.
- A style she actually likes | if she feels good in it, she'll wear it. That matters more than anything on this list.
Why One-Piece Swimsuits Work So Well for Pre Teens
Many mums find a one-piece is the sweet spot at this age. It stays put when she's diving, boogie boarding or racing her cousins into the waves, and it takes the worry out of constant adjusting. For girls who are starting to feel self-conscious, the extra coverage often makes the difference between spending the day in the water and spending it on the towel.
Features That Make Life Easier
Tie-back designs | a scoop-neck, criss-cross tie-back lets the swimsuit be secure and fit for every stage of growth.
Self-tying halter necks | she can tie it herself behind her neck, and a loop at the centre back lets the tie go over the shoulder into a bigger loop, which is much more comfortable if the back of her neck gets irritated.
Removable inserts | because they're removable, the same swimsuit can suit her now and still work as things change. And even when the inserts are taken out, there's an extra layer of fabric, a third layer, that sits very discreetly and keeps that area covered as she grows.
TAG•V Swimwear for Pre Teens
TAG•V SWIMWEAR is an Australian-owned swimwear brand for girls aged 9 to 16, created by a mum who understands exactly what families need at this stage. Every one-piece includes removable age-appropriate inserts and Inclusive Sizing, with tie-back and halter styles across both the Original Collection and the Sun Drip Collection.
TAG•V was awarded Silver for Teens & Tweens Product of the Year in the 2026 Mum Central Awards, voted for by real Australian families. You can see the award on Mum Central.
Browse the full TAG•V swimsuit collection to find her next favourite.
Frequently Asked Questions
What is the best swimwear for pre teens?
A full-coverage one-piece with removable age-appropriate inserts, an adjustable fit and quality fabric is a popular choice for pre teens, because it balances comfort, coverage and style.
What swimsuit should a 10 year old wear?
Most 10 year olds are comfortable in a one-piece with a secure fit, such as a tie-back or halter style she can adjust herself. Removable inserts are a useful extra as she starts to grow.
What swimsuit should an 11 year old wear?
At 11, many girls start preferring a little more coverage and support. A one-piece with removable age-appropriate inserts and an adjustable tie is a comfortable, confidence-building option.
Are one-piece swimsuits better than bikinis for pre teens?
Many mums prefer one-pieces for pre teens because they offer more coverage and stay in place during active swimming. One-pieces are also perfect for family resort getaways, and for time around cousins and brothers, where she may feel less confident. TAG•V SWIMWEAR makes beautiful, stylish designs to help her feel confident in every setting. It always comes down to what your daughter feels comfortable in.
How do I choose the right size swimsuit for my pre teen?
Check the brand's size guide and compare it with her current measurements rather than relying on her age alone. Adjustable styles like tie-backs give a little extra room as she grows.
Why do pre teen girls become self-conscious about swimwear?
Between the ages of about 9 and 12, girls become more aware of how their bodies look and how they compare with friends. Comfortable, full-coverage swimwear that fits well can help her feel more relaxed and confident in the water.
What features should I look for in swimwear for my daughter?
Look for age-appropriate coverage, removable inserts, an adjustable fit, durable UPF50+ fabric and Inclusive Sizing, plus a style she genuinely loves wearing.
Find the Right Fit
Shop the TAG•V swimsuit collection and find swimwear designed for real girls, real bodies and real confidence.