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        Wear the Future. Designed in the Now.

        Our jewelry speaks when words fall short.
      • Theme
        • Wild life
        • Geometry
        • Diamonds
        • Emotions
        • Zodiac Signs
        • Rebel
        Mega Menu Image

        Wear the Future. Designed in the Now.

        Our jewelry speaks when words fall short.
      • Gifting
        • Under 500$
        • Under 1000$
        • Under 1500$
        • Most popular
        • Exclusive
        Mega Menu Image

        Wear the Future. Designed in the Now.

        Our jewelry speaks when words fall short.
      • The KOTAOSTA difference
        • Tring
        • Jewellab
        • Guarantee
        Mega Menu Image

        Wear the Future. Designed in the Now.

        Our jewelry speaks when words fall short.
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      • About us
      • About KOTAOSTA
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  • Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring

    Side Stone ring

    White gold, Diamonds

    Regular Price
    $940.00
    Sale Price
    $940.00
    Regular Price
    Sale Sold Out
    Unit price
    ( /per  )

    Size  | 4.5

    Added to Cart View Cart or Continue Shopping.
    Cart Error Some items became unavailable. Update the quantity and try again.

    SIZE GUIDE

    Guessing the size? Not necessary. Got it wrong? No worries.


    You don’t need to know the exact size


    If the ring doesn't fit, we'll replace it


    Not just a gift — a feeling that lasts

    Size Guide for Surprise Gifts

    Not sure about the size? We’ve got you covered — the surprise stays a surprise.

    KOTAOSTA is all about emotions.
    But if you want the ring to fit perfectly from the start, here are 4 simple and discreet ways to measure your loved one’s finger size — without spoiling the surprise.

    1. Scan a ring using an app

    If you have access to a ring she already wears:

    • Open an app like
      Ring Sizer by Jason Withers
    • Place the ring directly on your phone screen and match it to the right size

    📲 Fast, easy, accurate — and 100% stealth

    2. Place her finger on your phone screen

    If you don’t have a ring but can gently compare her finger:

    • Open a sizing app or size chart on your phone
    • While she’s asleep or resting, carefully place her finger on the screen
    • Align her finger with the circles to estimate the size
    • Or take a photo of her finger and send it to us — we’ll help!

    💤 Works great at night — just a little light and finesse required

    3. Ask someone close

    A sister, friend, or mother might already know — or can help find out:

    • Have them casually try on rings together at a store
    • Ask them to take a photo of her hand with a ring
    • Or ask directly — without giving away the surprise

    💡 Your secret allies can make the difference

    4. Print out our sizing template

    • Download and print our PDF ring size chart
    • Place her ring on the circles and find the closest match
    • Or use the included paper strip to measure her finger discreetly

    👉 Download the Ring Size Template (PDF)

    🖨️ Simple and accurate — just follow the instructions carefully

    Still not sure?

    KOTAOSTA rings are made to adapt.
    If the size isn’t perfect — we’ll replace it for free.

    Buy it. Gift it. Enjoy the moment. Size is never an issue.

    Ring size conversion chart

     US Size EU Size Inner Diameter (mm)
    4.0 47.0 15.0
    4.5 48.0 15.3
    5.0 49.0 15.7
    5.5 50.0 16.1
    6.0 51.0 16.5
    6.5 52.0 16.9
    7.0 54.0 17.3
    7.5 55.0 17.7
    8.0 57.0 18.1
    8.5 58.0 18.5
    9.0 59.0 18.9
    9.5 60.0 19.3
    10.0 62.0
    19.7
    10.5 63.0 20.1
    11.0 65.0 20.6


    We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

    To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

    To start a return, you can contact us at alexlockkotaosta@gmail.com. Please note that returns will need to be sent to the following address: Malaga, San Pedro de Alcantara, avda de La Coruna 22, portal 5, bajo A

    If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

    You can always contact us for any return question at alexlockkotaosta@gmail.com.

    Damages and issues
    Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.

    Exceptions / non-returnable items
    Certain types of items cannot be returned, like perishable goods (such as food, flowers, or plants), custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.

    Unfortunately, we cannot accept returns on sale items or gift cards.

    Exchanges
    The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

    European Union 14 day cooling off period
    Notwithstanding the above, if the merchandise is being shipped into the European Union, you have the right to cancel or return your order within 14 days, for any reason and without a justification. As above, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.

    Refunds
    We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method within 10 business days. Please remember it can take some time for your bank or credit card company to process and post the refund too.
    If more than 15 business days have passed since we’ve approved your return, please contact us at alexlockkotaosta@gmail.com.

    How it works
    drawer-img-with-txt1
    Reliability
    drawer-img-with-txt2
    Compatibility
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    ×

    Click. Twist. Lock.

    Each T Ring is designed for effortless charm swapping — no tools, no waiting,just instant transformation.

    Patented bayonet system. Zero risk of loss.

    Tested and trusted by real people, our locking mechanism ensures a secureand lasting connection.

    All T Rings by KOTAOSTA are fully compatible with our charms — no limits.

    Mix, match, and transform your ring as you wish — every charm fits everyring.

    ...
    ×

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    Add your charm

    Choose a charm for your T-ring and become the designer of your own ring.

    Charm The heart lock

    Charm The heart lock

    $380.00
    Unit price
    /per 
    Charm Heart

    Charm Heart

    $380.00
    Unit price
    /per 
    Charm Amulet Cross

    Charm Amulet Cross

    $340.00
    Unit price
    /per 
    Charm Snake

    Charm Snake

    $1,470.00
    Unit price
    /per 
    Charm Diamond Snake

    Charm Diamond Snake

    $1,380.00
    Unit price
    /per 
    Charm Diamond Snake

    Charm Diamond Snake

    $1,380.00
    Unit price
    /per 
    Charm Panther

    Charm Panther

    $920.00
    Unit price
    /per 

    Expand your style

    Add another T ring to your collection and enjoy endless combinations.

    Classic ring

    Classic ring

    $750.00
    Unit price
    /per 
    Rounded ring

    Rounded ring

    $830.00
    Unit price
    /per 
    Side Stone ring

    Side Stone ring

    $940.00
    Unit price
    /per 
    Channel Set ring

    Channel Set ring

    $1,070.00
    Unit price
    /per 
    Pave ring

    Pave ring

    $1,260.00
    Unit price
    /per 
    Pave Dome ring

    Pave Dome ring

    $1,400.00
    Unit price
    /per 
    Classic ring

    Classic ring

    $750.00
    Unit price
    /per 

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    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring
    Side Stone ring

    Side Stone ring

    SKU   |   ko-sh-b02w-1
    Regular Price
    $940.00
    Sale Price
    $940.00
    Regular Price
    Sale Sold Out
    Unit price
    ( /per  )

    Size  | 4.5

    Added to Cart View Cart or Continue Shopping.
    Cart Error Some items became unavailable. Update the quantity and try again.

    Product Info

    I am the Side Stone Ring.
    Light in feel. Bold in shine.
    I add a touch of sparkle — subtle, yet striking.
    Everyday luxury that moves with you.
    Elevate the ordinary.

    Material White Gold 14K, Lab Diamonds 
    Diamond carat weight 0.35ct (D-F/VS)
    Product weight 2.5g (Size 6)
    Sizes 2.4mm band width, 1.8mm band depth

    Share

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    Product Title

    SKU   |   SKU-1234
    Regular Price
    €55,00
    Sale Price
    Regular Price

    Product Info

    Use this text to share information about your brand with your customers. Describe a collection, share announcements, or welcome customers to your store.

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