30% OFF + EXTRA 10% OFF WITH CODE SALE10

Summer favorites for tweens + teens, now on sale. Limited quantities available.*

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Tween & Teen Boutique | Trend-Forward Fashion for Girls

Curated by a mom and inspired by real besties everywhere, Sunday Best brings you standout styles, trending brands, and that extra bit of confidence every girl deserves. Discover your next main character moment—right here.

THE ARCHIVE SALE

Nearly five years of Sunday Best favorites—now up to 75% off.

SHOP THE ARCHIVE

PLEASE SHOP CAREFULLY — ALL SALE PURCHASES ARE FINAL SALE. NO RETURNS, EXCHANGES, STORE CREDIT, CANCELLATIONS, ORDER CHANGES OR PRICE ADJUSTMENTS.

Shop curated summer favorites for beach days, camp, parties, travel and everyday wear — including girls’ swimsuits, tween and teen summer outfits, dresses, skirts, matching sets and vacation-ready styles. NOW ALL 30% OFF + EXTRA 10% OFF WITH CODE SALE10

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      Visit Us

      14 Forest Avenue

      Locust Valley, New York 11560

      (516) 939 - 8780

      hello@sundaybestkids.com

      Store Hours:
      Monday: CLOSED
      Tuesday: 11am-5pm
      Wednesday: 11am-5pm
      Thursday: 11am-5pm
      Friday: 11am-5pm
      Saturday: 11am-5pm
      Sunday: 11am-3pm
      Directions

      *SALE TERMS + IMPORTANT INFORMATION
      All Summer Sale and Archive Sale purchases are FINAL SALE.
      No returns, exchanges, store credit, cancellations, order changes, or price adjustments will be accepted on sale merchandise. Please review your order carefully, including style, color, size, quantity, shipping address, and delivery method, before completing checkout.
      SUMMER SALE: Select styles are 30% off, plus an additional 10% off eligible Summer Sale styles with code SALE10at checkout. Code must be entered at checkout and cannot be applied retroactively to previously placed orders.
      ARCHIVE SALE: Select past-season merchandise is marked down up to 75% off. Code SALE10 does not apply to Archive Sale merchandise.
      Discounts and promotional codes cannot be combined with other offers unless specifically stated.
      Due to limited quantities, merchandise is available while supplies last. Adding an item to your cart does not reserve it. In the rare event an item becomes unavailable after an order is placed, the unavailable item will be refunded to the original form of payment.
      MULTIPLE ORDERS + SHIPPING: Orders placed separately are treated as individual orders and may ship separately. We cannot guarantee that multiple orders will be combined. If we are able to combine shipments, any shipping adjustment or refund will be determined after the order is packed and actual shipping costs are confirmed.
      By completing your purchase, you acknowledge and agree to these sale terms.

      What Our Besties Are Saying

      ⭐️⭐️⭐️⭐️⭐️

      “My daughter LOVED her Sunday Best dress! Beautiful quality, and she never wants to take it off.”

      — Jennifer, NY


      ⭐️⭐️⭐️⭐️⭐️

      “Super fast shipping and the cutest boutique finds. Every piece feels so special!”

      — Melissa, NJ


      ⭐️⭐️⭐️⭐️⭐️

      “We get compliments everywhere we go. Sunday Best is our new go-to for tween style!”

      — Ashley, CT


      ⭐️⭐️⭐️⭐️⭐️

      “I was nervous about online sizing, but everything fit perfectly—and customer service is amazing!”

      — Laura, NJ


      ⭐️⭐️⭐️⭐️⭐️

      “My picky tween finally found clothes she wants to wear. Thank you, Sunday Best!”

      — Brooke, NY


      ⭐️⭐️⭐️⭐️⭐️

      “Obsessed! The quality is way better than big box stores, and shipping was so quick.”

      — Michelle, NY


      ⭐️⭐️⭐️⭐️⭐️

      “We’re in London and my daughter is obsessed with her Sunday Best dress. Fast delivery and lovely quality!”

      — Emma, UK

      FAQs

      What ages does Sunday Best carry?

      Sunday Best carries clothing and accessories for girls, tweens, and teens, typically ranging from sizes 5–16. Our collections are thoughtfully curated to suit different ages and stages.

      Is Sunday Best good for tweens?

      Yes — tweens are at the heart of what we do. Our tween collection focuses on trend-forward styles that still feel age-appropriate, comfortable, and confidence-boosting.

      Is Sunday Best an online store or a physical boutique?

      Sunday Best is both. You can shop online anytime, or visit our boutique in Locust Valley, New York to explore our collections in person.

      What types of products do you sell?

      We offer a curated mix of girls’, tween, and teen clothing, including everyday outfits, party dresses, accessories, and giftable favorites updated seasonally.

      What makes Sunday Best different from big box retailers?

      Sunday Best focuses on thoughtfully curated styles you won’t find everywhere. We prioritize quality, fit, and age-appropriate fashion, offering pieces moms trust and girls genuinely love wearing.

      How often do you get new arrivals?

      New styles are added regularly throughout the season. Our New Arrivals collection is updated often, so there’s always something fresh to discover.