SwimHer
Why it's first
Makes its own sizes 1–4
- Size chart runs from girls' 16–18 up to women's 14–18
- Stocks its own sizes, far less “sold out”
- Age-appropriate coverage, mix-and-match
- One brand's styles; small-batch runs
Junior plus size swimsuits, for the teen who's outgrown girls' sizes
When she's past the girls' chart, “junior plus” is what many shoppers search for. These are brands worth checking, with notes on how to compare each one's own size chart and links to live stock.
Short answer, brands to check first:
SwimHer and Aerie for mix-and-match, Torrid for trend-forward women's plus, and Lands' End for modest 1X to 3X.
Prefer more coverage? We flag modest, higher-coverage styles (rash guards, swim shorts, full one-pieces) on every list.
Where to buy junior plus swim
Mix-and-match tops and bottoms are the secret here, so most of these let you size them separately.
Aerie
Hidden category
Aerie Swim, separate tops & bottoms (XXS–XXL)
- Buy top and bottom in different sizes
- On-trend styles teens actually want
- Frequent BOGO swim deals
- Some cuts skimpy; filter for coverage
Torrid
Hidden category
Women's plus swim (sizes 10–30)
- Built entirely for plus bodies; true fit
- Strong bust support, trend styles
- Tops, bottoms, one-pieces sized separately
- Styled for older teens/adults; premium price
Old Navy
Hidden category
Women's Plus Swim
- Cheap, trendy, huge style range
- Separates and one-pieces both in plus
- Frequent sitewide sales
- Adult cuts; check coverage for younger teens
Lands' End
Hidden category
Women's Plus Swim, 1X–3X
- Highest-coverage, modest cuts and swim shorts
- Long-torso lengths listed on its swim chart
- Mix-and-match by exact size
- Classic styling; higher price
Amazon
Hidden category
“Junior plus size swimsuits”
- Biggest selection across every price point
- Fast Prime delivery before a trip
- Filter by size; read recent fit reviews
- Seller sizing varies; check reviews first
Buttons open each brand's live results in a new tab. We don't hold inventory; prices and stock are set by each store.
From girls' 20 to junior plus, made simple
The jump from the kids' chart into junior or women's plus trips up almost everyone. Here's the map.
Girls' 20 is the end of the kids' chart
After it, many brands move you to women's sizes, often listed as 1X, 2X, 3X. Sizes don't line up across brands: Lands' End lists a girls' 20 at a 37½ in chest and its women's 1X (16W) at a 44 in bust. Check each brand's own size chart.
“Junior plus” is a shopper's term, not a chart size
None of the brand charts we checked label a size “junior plus.” Torrid's swim charts are women's plus sizes 10–30, and SwimHer's chart runs from girls' 16–18 up to women's 14–18.
Women's plus charts can include torso length
Lands' End's women's swim chart lists petite, regular and long torso lengths for 1X (16W), at 63½, 66 and 68½ in. Follow the brand's own instructions to measure.
Still in the kids' range? Start with the girls size 18 guide or plus swimwear for tweens.
Junior plus swim: questions answered
What size comes after girls' size 20?
After girls' 20, the next step is usually women's sizing, often listed as 1X, 2X, 3X. Sizes don't line up across brands: Lands' End lists a girls' 20 at a 37½ in chest and a women's 1X (16W) at a 44 in bust. Measure chest, waist and hip and match the brand's own chart rather than guessing from the girls' number.
Is junior plus the same as women's plus?
“Junior plus” is mostly a shopper's term; none of the brand charts we checked use that name. Torrid's swim charts are women's plus sizes 10–30, Lands' End's women's swim chart runs 0X–3X, and SwimHer's chart runs from girls' 16–18 up to women's 14–18. Compare her measurements against each brand's own chart, including torso length where it's listed.
Where can I find junior plus tankinis?
Torrid sells tankinis and has separate swim top (bust) and bottom (waist and hip) size guides, and SwimHer notes you may wear a different top and bottom size. Check each brand's own size chart and product pages for tankini availability.
Are there modest junior plus options?
Yes. Lands' End (including a girls' plus rash guard swim set with modest coverage) and SwimHer (including a modest one-piece) both offer higher-coverage styles. Check each product page for coverage details and each brand's own size chart for fit. See our modest swimsuits guide.