Rylee + Cru Millie One-Piece – Dusty Blue | Girls UPF 50+ Swimsuit – Hey Little Diddle

Free Delivery On All Orders Over $150

Visit our shops at Carmel City CenterMonday - Saturday • 10am - 5pm

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

Millie One-Piece Dusty Blue

$52.00

Shipping calculated at checkout.

Delivered in 2-4 days*

In stock, ready to ship
Backordered, shipping soon

The go-to swimsuit of the season, in a beautiful solid. The Rylee + Cru Millie One-Piece in Dusty Blue is a girls’ swimsuit that earns its place as a warm-weather wardrobe staple — fixed knotted straps, UPF 50+ protection, and a nearly fully recycled construction that’s as good for the planet as it looks on the beach.

The soft dusty blue colorway is effortlessly versatile and pairs beautifully with the Boys Rashguard Set, Relaxed Bubble Romper, and Play Set in the Seals collection for a coordinated sibling look.

Details

Dusty blue colorway
UPF 50+ sun protection
Fixed knotted straps

Materials & Care

98% recycled polyester, 2% elastane
Machine wash cold, delicate cycle recommended
Hang dry

COMPLIMENTARY DELIVERY on all orders over $150

We choose 2-3 day USPS, FedEx or UPS shipping to send your items to you.

Keep in mind, remote areas and weather may delay delivery.

2-3 day stands for 2-3 business days M-F, excluding holidays.

Items purchased after 11:00am are packaged and sent the following (business) day.

All shipments include tracking.

If for some reason you're not happy with your selection(s), you're welcome to send back your unworn item to us for store credit, minus all ship costs - within 14 days.

Noralee, plush and discounted items are final sale.

[{"id":49606318784752,"title":"3-6M","option1":"3-6M","option2":null,"option3":null,"sku":"RC379KSLE-3-6M","requires_shipping":true,"taxable":true,"featured_image":{"id":53346308948208,"product_id":9992074625264,"position":1,"created_at":"2026-04-24T09:50:13-04:00","updated_at":"2026-06-07T15:15:04-04:00","alt":null,"width":2560,"height":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704","variant_ids":[49606318784752,49606318817520,49606318850288,49606318883056,49606318915824,49606318948592,49606318981360]},"available":false,"name":"Millie One-Piece Dusty Blue - 3-6M","public_title":"3-6M","options":["3-6M"],"price":5200,"weight":0,"compare_at_price":null,"inventory_quantity":0,"inventory_management":"shopify","inventory_policy":"deny","barcode":"785787941318","featured_media":{"alt":null,"id":44375800086768,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2560,"width":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":49606318817520,"title":"6-12M","option1":"6-12M","option2":null,"option3":null,"sku":"RC379KSLE-6-12M","requires_shipping":true,"taxable":true,"featured_image":{"id":53346308948208,"product_id":9992074625264,"position":1,"created_at":"2026-04-24T09:50:13-04:00","updated_at":"2026-06-07T15:15:04-04:00","alt":null,"width":2560,"height":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704","variant_ids":[49606318784752,49606318817520,49606318850288,49606318883056,49606318915824,49606318948592,49606318981360]},"available":true,"name":"Millie One-Piece Dusty Blue - 6-12M","public_title":"6-12M","options":["6-12M"],"price":5200,"weight":0,"compare_at_price":null,"inventory_quantity":1,"inventory_management":"shopify","inventory_policy":"deny","barcode":"785787941325","featured_media":{"alt":null,"id":44375800086768,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2560,"width":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":49606318850288,"title":"12-18M","option1":"12-18M","option2":null,"option3":null,"sku":"RC379KSLE-12-18M","requires_shipping":true,"taxable":true,"featured_image":{"id":53346308948208,"product_id":9992074625264,"position":1,"created_at":"2026-04-24T09:50:13-04:00","updated_at":"2026-06-07T15:15:04-04:00","alt":null,"width":2560,"height":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704","variant_ids":[49606318784752,49606318817520,49606318850288,49606318883056,49606318915824,49606318948592,49606318981360]},"available":true,"name":"Millie One-Piece Dusty Blue - 12-18M","public_title":"12-18M","options":["12-18M"],"price":5200,"weight":0,"compare_at_price":null,"inventory_quantity":1,"inventory_management":"shopify","inventory_policy":"deny","barcode":"785787941332","featured_media":{"alt":null,"id":44375800086768,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2560,"width":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":49606318883056,"title":"18-24M","option1":"18-24M","option2":null,"option3":null,"sku":"RC379KSLE-18-24M","requires_shipping":true,"taxable":true,"featured_image":{"id":53346308948208,"product_id":9992074625264,"position":1,"created_at":"2026-04-24T09:50:13-04:00","updated_at":"2026-06-07T15:15:04-04:00","alt":null,"width":2560,"height":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704","variant_ids":[49606318784752,49606318817520,49606318850288,49606318883056,49606318915824,49606318948592,49606318981360]},"available":true,"name":"Millie One-Piece Dusty Blue - 18-24M","public_title":"18-24M","options":["18-24M"],"price":5200,"weight":0,"compare_at_price":null,"inventory_quantity":1,"inventory_management":"shopify","inventory_policy":"deny","barcode":"785787941349","featured_media":{"alt":null,"id":44375800086768,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2560,"width":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":49606318915824,"title":"2-3Y","option1":"2-3Y","option2":null,"option3":null,"sku":"RC379KSLE-2-3Y","requires_shipping":true,"taxable":true,"featured_image":{"id":53346308948208,"product_id":9992074625264,"position":1,"created_at":"2026-04-24T09:50:13-04:00","updated_at":"2026-06-07T15:15:04-04:00","alt":null,"width":2560,"height":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704","variant_ids":[49606318784752,49606318817520,49606318850288,49606318883056,49606318915824,49606318948592,49606318981360]},"available":false,"name":"Millie One-Piece Dusty Blue - 2-3Y","public_title":"2-3Y","options":["2-3Y"],"price":5200,"weight":0,"compare_at_price":null,"inventory_quantity":0,"inventory_management":"shopify","inventory_policy":"deny","barcode":"785787941356","featured_media":{"alt":null,"id":44375800086768,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2560,"width":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":49606318948592,"title":"4-5Y","option1":"4-5Y","option2":null,"option3":null,"sku":"RC379KSLE-4-5Y","requires_shipping":true,"taxable":true,"featured_image":{"id":53346308948208,"product_id":9992074625264,"position":1,"created_at":"2026-04-24T09:50:13-04:00","updated_at":"2026-06-07T15:15:04-04:00","alt":null,"width":2560,"height":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704","variant_ids":[49606318784752,49606318817520,49606318850288,49606318883056,49606318915824,49606318948592,49606318981360]},"available":false,"name":"Millie One-Piece Dusty Blue - 4-5Y","public_title":"4-5Y","options":["4-5Y"],"price":5200,"weight":0,"compare_at_price":null,"inventory_quantity":0,"inventory_management":"shopify","inventory_policy":"deny","barcode":"785787941363","featured_media":{"alt":null,"id":44375800086768,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2560,"width":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":49606318981360,"title":"6-7Y","option1":"6-7Y","option2":null,"option3":null,"sku":"RC379KSLE-6-7Y","requires_shipping":true,"taxable":true,"featured_image":{"id":53346308948208,"product_id":9992074625264,"position":1,"created_at":"2026-04-24T09:50:13-04:00","updated_at":"2026-06-07T15:15:04-04:00","alt":null,"width":2560,"height":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704","variant_ids":[49606318784752,49606318817520,49606318850288,49606318883056,49606318915824,49606318948592,49606318981360]},"available":false,"name":"Millie One-Piece Dusty Blue - 6-7Y","public_title":"6-7Y","options":["6-7Y"],"price":5200,"weight":0,"compare_at_price":null,"inventory_quantity":0,"inventory_management":"shopify","inventory_policy":"deny","barcode":"785787941370","featured_media":{"alt":null,"id":44375800086768,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2560,"width":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}]

{"id":49606318817520,"title":"6-12M","option1":"6-12M","option2":null,"option3":null,"sku":"RC379KSLE-6-12M","requires_shipping":true,"taxable":true,"featured_image":{"id":53346308948208,"product_id":9992074625264,"position":1,"created_at":"2026-04-24T09:50:13-04:00","updated_at":"2026-06-07T15:15:04-04:00","alt":null,"width":2560,"height":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704","variant_ids":[49606318784752,49606318817520,49606318850288,49606318883056,49606318915824,49606318948592,49606318981360]},"available":true,"name":"Millie One-Piece Dusty Blue - 6-12M","public_title":"6-12M","options":["6-12M"],"price":5200,"weight":0,"compare_at_price":null,"inventory_quantity":1,"inventory_management":"shopify","inventory_policy":"deny","barcode":"785787941325","featured_media":{"alt":null,"id":44375800086768,"position":1,"preview_image":{"aspect_ratio":1.0,"height":2560,"width":2560,"src":"\/\/www.heylittlediddle.com\/cdn\/shop\/files\/RC379KSLE-BLUE-1.jpg?v=1780859704"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}

About us

Hey Little Diddle

Fresh arrivals designed with purpose and built to perform.

Explore our collection in our boutique at Carmel City Center.

You may also like

Recently viewed

Back to $50 - $75 | Collection

Rylee + Cru Millie One-Piece – Dusty Blue | Girls UPF 50+ Swimsuit