The Best Underwear for 12-Year-Old Girls
Shopping for underwear at 12 isn’t just about finding the right size; it’s about finding something that feels right. That old pair with the itchy seams? It’s probably not cutting it anymore. And the princess ones from five years ago? Cute then, awkward now.
Whether they’re navigating growth spurts or figuring out their own sense of style, 12-year-olds need underwear that actually feels good to wear (and doesn’t distract them during the day).
From soft cotton undies that don’t ride up to fun, confidence-boosting designs, this guide rounds up the best underwear for 12-year-old girls.
Let’s make comfort cool—one pair at a time.
What Makes the Best Underwear for 12-Year-Old Girls?
At 12, life is full of change, and every garment girls wear should keep up, not get in the way. The best girls' panties aren't just about cute prints (though those are a win, too). It's about the feel, the breathability, and the kind of fit that lets them move, stretch, run, lounge, and feel totally themselves.
Here’s what to look for:
Soft, breathable fabrics
Cotton underwear for 12-year-old girls is a favorite for a reason: it's gentle on the skin and lets the body breathe throughout the day. Look for blends with a touch of stretch so the fit moves with her.
No tags, no drama
Sensory-friendly features matter. Think tag-free seams, wide waistbands, and garments that don't dig, ride up, or bunch under clothes.
Stylish without being grown-up
Stylish underwear for a 12-year-old girl doesn't have to look like it came from the grown-up aisle. Fun colors, playful prints, or reversible designs keep things fresh while still being age-appropriate.
Easy to find, easy to love
Whether someone’s shopping in-store or browsing underwear for a 12-year-old girl on Amazon, it helps to choose trusted brands that offer easy returns and clear sizing. Bonus points for multipacks—they mean fewer laundry emergencies.
A good fit, with a little room to grow
Bodies change fast at this age. Look for pieces with a flexible fit and good stretch that can keep up with growth spurts without needing a drawer refresh every few months.
Meet the Brands We Trust
When it comes to finding the best brands, we didn’t just rely on labels or packaging promises. We looked for ones that understand what teens really need at this age, what style feels age-appropriate (without being boring), and what materials actually hold up to school days, sleepovers, and growth spurts.
Each brand we've included here has been selected for its quality, fit, and reputation with real parents and tweens. Some are go-to names and others might be new discoveries. But all of them earned their spot on the list.
1. Bleuet
Bleuet was created to solve a problem moms know well: that most bras and panties weren’t made with tweens in mind. They can be either overly childish or miniature versions of adult styles, uncomfortable, impractical, and often not built to fit changing bodies. So Bleuet built something better.
Our range of underwear and training bras is designed specifically for early teens. Each piece is made with buttery-soft, breathable fabrics, tag-free construction, and thoughtful cuts that support movement and growing confidence. We offer a 60-day free return policy (as long as it’s still in the packaging).
Key features
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Crafted from a breathable modal-spandex blend for a second-skin feel that's moisture-wicking and gentle on sensitive skin
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Seamless design with no tags or scratchy seams, ensuring a smooth look under clothes
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Available in a range of colors and clean silhouettes that they'll actually want to wear
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Inclusive sizing is designed for developing bodies ranging from 6 to 24
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Retains shape and feel after repeated washing, making them perfect for busy, active days
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Gently worn returns are donated to Hailey's Haven, supporting girls in foster care.
2. Hanna Andersson
Hanna Andersson's collection is made from heavier-weight organic cotton designed to stand up to repeated wear and washing. Known for its durability, the range is often passed down between siblings and is now resold via the brand's own Hanna-Me-Downs marketplace.
Most pieces are tag-free and cut for full coverage, with options including classic briefs, hipsters, and girlshorts. Prints tend to mix bold basics, like navy and heather grey, with playful designs, including licensed favorites like Pokémon, Star Wars, and Disney Princess.
Key features
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Full-coverage, tag-free styles with reinforced seams
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Made from GOTS-certified organic cotton
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Colorfast prints and character designs
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Their resale platform encourages reuse
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Sizes from toddler to age 14+
3. Reebok
Reebok offers a range of garments designed with movement in mind. Most styles are made from synthetic blends like nylon or polyester with added stretch, aiming to provide a smooth fit under clothes and flexibility for active kids.
Popular options include seamless hipsters and boyshorts that sit low on the waist with minimal seams and no tags. These are often favored by tweens looking for a "barely-there" feel under leggings or sports uniforms. Color packs typically include bright shades and sporty neutrals.
Key features
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Stretchy, seamless designs with a close fit
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Tag-free and wedgie-resistant
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Often sold in multipacks with assorted colors.
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Lightweight fabric suited to sports or daily wear
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Sizes typically range from 5 to 16
4. Aimer
Aimer Kids, the sub-brand of Chinese intimates giant AÍMER, was created to support teens through every stage of early development. Known for technical fabrics and clean, modern silhouettes, the brand designs collections that feel elevated yet age-appropriate.
Popular styles include mid-rise briefs, boyshorts, and high-waisted panties that offer extra support when it’s needed most. Their signature “milk fiber” collection, made from modal and viscose blends, delivers a smooth, second-skin feel that’s perfect for tweens with sensory sensitivities or active routines.
Key features
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Soft-touch modal, viscose, and copper-ammonia blends
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Breathable mesh and seamless construction for activewear
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High-waist period panties with moisture-locking layers
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Sizing from age 10 to 18
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Neutral tones and muted pastels for a more grown-up feel.
5. Yellowberry
Yellowberry is a US-based brand that focuses on undergarments for youth. Founded by 17-year-old Megan Grassell in 2013, the company offers colorful, age-appropriate basics designed with comfort and coverage in mind. Their collection includes seamless and cotton briefs in playful shades, often sold in multipacks. Many styles are tag-free and designed for sensitive skin.
Yellowberry's sizing and silhouettes are tailored for younger wearers, featuring simple shapes and high-quality materials suitable for everyday use. Their photography features real bodies rather than professional models.
Key features
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Cotton and seamless fabrics designed for sensitive skin
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Size range from XS (8/10) to Plus 1 (20)
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Multipack options, including six-packs
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Simple colors and styles suited to tweens and early teens
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Free shipping on orders over $100
6. Modibodi
Modibodi is an Australian brand specializing in reusable, leak-proof panties. The teen range includes hipster, boyshort, and bikini cuts designed to absorb menstrual flow without the need for disposable products. Each style is tailored for comfort, with a gentle feel, full coverage, and simple, sport-friendly shapes.
The brand also adopts a sustainability-led approach, utilizing OEKO-TEX-certified fabrics and focusing on long-term wear. Modibodi offers a 60-day trial for new customers and is a certified B Corp.
Key features
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Sizing is listed by age group, from Y8–10 up to Y16–18
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Absorbency options range from moderate to super and overnight.
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Each product is tested to be leak-proof for up to 100 washes.
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Period kits and multipacks available, including 3-, 5-, and 6-packs
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Select prints from SmileyWorld® and other limited-edition collaborations.
7. Athleta Girl
Athleta Girl, part of the Gap Inc. family, offers a range of activewear and basics, including underwear. Known for combining feel with performance, their underwear is built to support movement throughout the day, whether that’s at school, in sports, or relaxing at home. The materials are typically stretchy and moisture-wicking, and styles like the Everyday Seamless Brief are designed to disappear under clothes, with a smooth finish and no side seams.
Athleta Girl also places a strong emphasis on body positivity and inclusivity in both design and marketing, featuring a diverse range of models and sizes to reflect the diversity of real girls.
Key features:
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Seam-free construction for all-day use and minimal chafing
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Lightweight, breathable fabrics with moisture-wicking properties
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Available in multipacks with pastels and neutral tones
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Inclusive sizing from XXS to XL (roughly ages 6–18)
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Designed to move with active girls, from dance class to downtime
Final Thoughts
Shopping for underwear for 12-year-old girls isn’t just about ticking off a size chart. It’s about finding something that fits their body and sense of self—something they feel good putting on each morning.
Every brand featured in this guide was selected for its fit, quality, and age-appropriate style. Whether they prefer cotton, seamless designs, or need extra support for their period, there’s an option that works.
Looking beyond underwear? We've also covered bras for 12-year-olds, including how to know when a girl is ready to start wearing a bra.
FAQs
What size underwear should a 12-year-old girl wear?
It depends on her height, weight, and how she's growing, some 12-year-olds might still wear kids' sizes, while others may be ready for teen or even junior sizing. Always check each brand's size chart, and look for stretchy fabrics and flexible waistbands that can grow with her.
What type of underwear do teenage girls wear?
Most teens opt for styles like briefs, hipsters, or boy shorts. Seamless underwear and cotton blends are especially popular because they feel virtually invisible under clothes and withstand the rigors of busy school days and sports.
What type of underwear is best for kids?
The best styles for kids are breathable and tag-free, with a comfy waistband that stays in place. Cotton or moisture-wicking fabrics are great choices, especially for active days or sensitive skin.
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