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Flat lay of the One Piece New World Harness featuring Straw Hat Jolly Roger symbols on black fabric with red trim and adjustable straps.
Corgi wearing the light blue One Piece New World harness and matching leash in size medium by Pawsonify
Golden British Shorthair cat wearing the light blue One Piece New World harness in size XXS by Pawsonify
One Piece Pawsonify harness size chart showing neck and chest measurements in inches for six sizes.
Silver cat wearing the light blue One Piece New World harness and leash in size XS by Pawsonify
One Piece

New World Harness

Sale price$35.00
Size:
Neoprene Harness Size Chart
Size Neck (Inches) Chest (Inches) Approx. Weight (Dogs)
XXS 9½ – 12″ 11 – 13½″ 2 – 7 lbs
XS 12 – 14″ 14 – 18½″ 5 – 15 lbs
S 14 – 17½″ 17½ – 21½″ 10 – 25 lbs
M 16 – 21″ 18½ – 24½″ 20 – 40 lbs
L 17 – 23″ 23½ – 32″ 30 – 70 lbs
XL 21 – 28″ 24½ – 33½″ 60 – 100 lbs

🐱 For cats: XXS fits most cats under 10 lbs, and XS fits cats from 10–22 lbs.

Size
Only 3 in stock — almost gone!
Officially Licensed
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Product Features
  • Crafted with durable neoprene fabric.​
  • For our cat-loving fans, we recommend XXS for cats up to 10 lbs and XS for cats 10 lbs and over.
  • For dog sizing, we recommend checking our size chart for detailed guidance.
AVAILABLE IN THE FOLLOWING REGIONS
🇺🇸 🇨🇦
United States, Canada
OFFICIALLY LICENSED PRODUCT

©Eiichiro Oda / Shueisha, Toei Animation

Outfit your pet for the Grand Line with the “New World” Harness – inspired by One Piece and made for adventure! This vibrant harness features the iconic Straw Hat Jolly Roger symbols of Luffy’s crew printed across the chest and straps, celebrating the bond of Nakama with every step. Built for both comfort and durability, it’s perfect for any pirate-loving pet and their crew.

  • For our cat-loving fans, we recommend XXS for cats up to 10 lbs and XS for cats 10 lbs and over.

  • Please refer to our size chart for further reference.

Pets Wearing This

See how it fits on real pets.

Bean

🐱 Bean

9 lb • Cat (Adult)

Wearing XXS

Jett

🐶 Jett

10 lb • Pomeranian

Wearing XS

Shimi

🐱 Shimi

12 lb • Cat (Adult)

Wearing XS

Remi

🐶 Remi

15 lb

Wearing S

Nori

🐶 Nori

25 lb • Corgi

Wearing M

Riku

🐶 Riku

65 lb • Husky

Wearing XL

Only at Pawsonify

📦 $6.95 Flat Rate Shipping (USA) • Free Shipping $50+

New World Harness

For Cats & Dogs
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  • 5 stars: 4 (100%)
  • 4 stars: 0 (0%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
Some of the reviews shown are from related products the merchant grouped with this one.
A
Alaina H. (United States)
my boy is dripped out

got the one piece new world set (collar, harness, leash) with the gum gum fruit tag for my boy lucio. everything looks great! the light blue color is gorgeous on him. the harness proportions feel a little strange but it could be cause my dog has strange proportions and we aren't used to it yet. my only complaint is that we dont have a full set for luffy or chopper (lucio isnt a zoro guy)

photos dont do it justice cause he's too fluffy to see it properly but he looks cute regardless. thanks pawsonify team!

User picture User picture User picture User picture

Thank you so much for your supoort and for leaving such adorable photos! <3 We'd love to hear more about your thoughts on the proportions. We'll be reaching out! We are always looking to improve our products. ^_^ -V

A
Ashley (United States)
Love it!!!

my pup, Monkey D. Floofy, looks great in his one piece gear! The collar and leash are constructed really well. He was the type to always try to play tug o war with his leash at first and the leash stood up to his teeth very well!!

User picture

Monkey D. Floofy is the perfect name for such a cute and adventurous pup! ‍☠️ He sounds like a true Straw Hat in training, and we’re so glad the gear is holding up strong. Thanks for the love!

N
Niikky

Cute and sturdy, color is exactly as described. It's very hard nowadays to find 6ft long leash that has comfortable grip, practical and cute. The clip is perfect weight for harness for a Large, if using with collar, i would recommend size M.

B
Biscuit

Fast, cute, and great quality!

Questions about this product

Are the harnesses adjustable to fit pets with unique body shapes?

Yes, our harnesses are fully adjustable, making it easy to achieve a secure and comfortable fit for pets with unique body shapes. The adjustable straps also accommodate growth, but as your pet reaches their full size, you may need to size up to maintain their comfort.

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How do I adjust the harness to fit my pet?

To adjust the harness:

  1. Locate the adjustment sliders on the straps.
  2. Slide the straps through the sliders to loosen or tighten the fit as needed.
  3. Check the fit to ensure it’s snug but comfortable—there should be enough room to fit two fingers between the harness and your pet.

This ensures a secure and comfortable fit for your pet’s adventures!

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How do I choose the right size harness for my pet?

For Dog Sizing, we recommend checking our harness size charts for detailed guidance.

  • For our cat-loving fans, we recommend XXS for cats up to 10 lbs and XS for cats 10 lbs and over.
  • And trust us - our employee has a 22 lbs cat, he wears our XS~!
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How do I clean and maintain the harness to ensure it lasts?

Spot clean with cold water and mild, pet-safe detergent (free and clear formulas recommended). Lay flat to dry.

Avoid machine washing or tumble drying — the designs are sublimation-printed, and harsh cycles or heat can affect the print and hardware.

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How do I properly put the harness on my pet?

Putting the harness on your pet is simple:

  1. Unbuckle the harness and lay it open.
  2. Place the harness over your pet’s head so the front loop sits comfortably on their chest.
  3. Adjust the straps around their body and secure the buckle.
  4. Check the fit to ensure it’s snug but not too tight—allow room for two fingers to fit between the harness and your pet.
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How does this harness fit compared to other Pawsonify harnesses?

Most of our harnesses share the same size chart, but small design differences mean some styles run a little roomier or snugger than others. If your pet is between sizes, use your chest-girth measurement and the size chart as your guide — and when in doubt, size up for comfort.

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Is this a step-in harness or does it go over the head?

Our harnesses go over the head rather than being step-in. You unbuckle and lay the harness open, slip the front loop over your pet's head so it rests on their chest, then fasten the adjustable side buckle and check the fit — snug, with room for two fingers.

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Is this harness safe for leash walking, or is it mainly for fashion?

Both — our harnesses are made for real, everyday leash walking, not just looks. Each has a secure leash attachment point and fully adjustable straps so you can get a comfortable, snug fit.

As with any harness, make sure it's properly adjusted (snug, with room for two fingers) before you head out, and keep an eye on strong pullers or escape-prone pets.

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Is this harness suitable for cats?

Yes! Many of our harnesses come in cat-friendly sizes — we recommend XXS for cats up to 10 lbs and XS for cats 10 lbs and over (one of our team's 22 lb cats happily wears an XS).

Check the size dropdown and harness size chart to confirm the right fit.

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Officially Licensed

Show your love for your favorite series with our officially licensed merch!

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Returns & Exchanges accepted within 30 days of delivery on eligible items.

We Love Pets

We love pets at Pawsonify! Pet comfort & safety is our #1 Priority here!

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We ship within 1-2 business days! Orders are shipped with USPS, DHL, or UPS.

Customers rate us 4.9/5 based on 1448 reviews.
Officially Licensed
30-Day Returns
Fast & Reliable Shipping
Secure Checkout