i/solid/header/3 i/solid/header/3 copy
i/solid/header/3 copy 2 0
z
z
i/solid/header/3 Search
i/solid/header/3 copy 2 0 Cart
z
z

* KatieJ NYC Tween *

KatieJ NYC is a fashion-forward designer girls clothing brand crafted for tween girls who want modern, confidence-boosting looks with everyday versatility and boutique style. At Everything But The Princess, our curated KatieJ NYC tween dresses and outfit collections bring NYC design energy to school days, parties, family events, and casual weekends.
Designed for girls across sizes — including girls sizes 7-14 — KatieJ NYC delivers polished silhouettes, trendy details, and premium fabrics that keep style and comfort in perfect balance. From best-selling dresses and matching sets to cozy loungewear and statement tops, this boutique collection empowers girls to express their personal style with confidence.
Looking for more elevated fashion for tweens? Explore other tween fashion designers in our boutique to mix and match standout looks for every occasion.
FAQ for KatieJ NYC :
Q1: What sizes does KatieJ NYC offer?
A: KatieJ NYC clothing is available for tween girls in sizes  7–14.. Shop dresses, tops, sets, and more designed for fashion-forward tweens.
Q2: Do KatieJ NYC dresses run small or true to size?
A: KatieJ NYC dresses run a full size small. We highly recommend going up one full size for this designer. 
Q3: What occasions are KatieJ NYC outfits suitable for?
A: KatieJ NYC clothing is versatile — perfect for school, parties, special events, and everyday wear with polished, boutique style.
Q4: How should I style KatieJ NYC dresses?
A: Pair KatieJ NYC dresses with trendy accessories, layered jackets, or statement shoes. Each outfit empowers tweens to feel confident and stand out.

 

Sale
KatieJ NYC Tween Moana Bikini- Black/White
Quick View
SIZE UP A FULL SIZE ——- RUNS SMALL

The Moana Bikini is your go to for sun days and beach hangs. With its classic triangle fit and delicate floral detail, it’s effortlessly cute and made to feel as good as it looks.

PRODUCT FEATURES:

  • Sold as a set
  • Adjustable triangle top
  • Side tie bottoms
  • Floral applique detail

CONTENT & CARE:

  • Shell: 82% Polyamide, 18% Elastane
  • Lining: 90% Polyester, 10% Elastane
  • Hand wash
z
z
KatieJ NYC Tween Moana Bikini- Black/White $30.00 $78.00
Sale
KatieJ NYC Tween Moana Sarong- Black
Quick View

2 items left

The Moana Sarong is the perfect lightweight layer for beach days and beyond. Designed to throw on effortlessly over the Moana Bikini, it adds an easy, put together feel to your swim look. Whether you’re by the water or heading to lunch, it’s a versatile piece you’ll reach for all summer long.

PRODUCT FEATURES:

  • Designed to pair with the Moana Bikini
  • Adjustable wrap style for a customizable fit
  • Lightweight fabric
z
z
KatieJ NYC Tween Moana Sarong- Black $15.00 $42.00
KatieJ NYC Tween Jordyn Sporty Short - Dusty Mauve/White
Quick View
SIZE UP FOR THIS STYLE

1 item left

The shorts your daughter will wear on repeat. Our tween girls flipped for these stripe athletic shorts. They are a vibe, and an effortless one. The girls love to mix and match these with basic tees and tanks and fun graphic tees too. Its easy fashion that looks fab and is so comfortable to wear. The Jordyn Shorts by Katie J mixes athletic vibes with edgy style. With bold contrast stripes, they’re perfect for working out or rocking a laid-back look. Effortlessly cool and ready for anything! We offer these must have sporty shorts for tween girls in loads of cool color combos and of course all the tops to match. 

Style Tips:

Mix with basic tanks and tees for a easy, breezy vibe

Layer with a sweatshirt for the cutest athliesure look 

Pair with a cute graphic tee for a fun, effortless day look 

PRODUCT FEATURES:

  • Contrast stripes
  • Elastic Waistband

CONTENT & CARE:

  • 100 Polyester
z
z
KatieJ NYC Tween Jordyn Sporty Short - Dusty Mauve/White $54.00
KatieJ NYC Tween Axel Skirt - Houndstooth
Quick View
SHIPS 10/30

2 items left

The Axel Skirt by KatieJ NYC brings a polished preppy edge to tween style with trending houndstooth print, crisp pleats, and double black faux-leather belt straps with  buckles at the side. This statement mini skirt is easy to dress up for special occasions or style casually with a fitted tee, sweater, or cardigan.

Pair it with black ballet flats, loafers, or boots for a chic fall and holiday-ready look.

z
z
KatieJ NYC Tween Axel Skirt - Houndstooth $78.00
KatieJ NYC Tween Shayla Bow Dress- Black + Cream * Preorder*
Quick View
SIZE UP FOR THIS STYLE - SHIPS 10/30

The KatieJ NYC Shayla Bow Dressin Black + Creamis all about statement-making style for tween girls. A dramatic oversized bow at the neckline gives this little black dress its standout look, while the sleek fitted silhouette keeps it polished and party-ready.

Designed with a flattering sweetheart neckline and adjustable spaghetti straps, the Shayla has that elevated, fashion-forward feel tweens love for their biggest occasions. The classic black color makes it easy to accessorize and gives the oversized satin bow all the attention.

It’s a perfect choice for school dances, mini homecoming, mitzvah celebrations, birthday parties, holiday events,  family celebrations, and other dressy occasions.

 

z
z
KatieJ NYC Tween Shayla Bow Dress- Black + Cream * Preorder* $145.00
KatieJ NYC Etta Dress- Black Celestial Beaded * Preorder *
Quick View
Size - Size Up For This Designer- SHIPS 10/30

2 items left

She will be the spotlight of the party in this sequin bow stunner by KatieJ. This tween girls party dress features sequin detailing that sparkles with ever move she makes.

z
z
KatieJ NYC Etta Dress- Black Celestial Beaded * Preorder * $198.00
KatieJ NYC Bessie Satin Holiday Dress in burgundy for tween girls
KatieJ NYC Bessie Satin Holiday Dress * Preorder *
Quick View
Size

2 items left

Make her holiday entrance unforgettable in the KatieJ NYC Bessie Satin Holiday Dress. This polished burgundy satin party dress features a sleek strapless neckline, a softly structured fit-and-flare silhouette, and a petite bow at the waist for a timeless finishing touch.

Perfect for holiday parties, family celebrations, special dinners, winter events, and festive photos, the Bessie Dress delivers an elevated tween look with just the right amount of sweetness.

Product Features:

  • Rich burgundy satin
  • Strapless neckline
  • Fit-and-flare silhouette
  • Bow detail at the waist
  • Mini length
  • Preorder style
z
z
KatieJ NYC Bessie Satin Holiday Dress * Preorder * $135.00

Search

i/solid/header/3