showroom
Showroom only — pieces are not for sale yet. Use GET NOTIFIED on any product page or the general interest form on the homepage to receive details before a drop. Interest in specific pieces or sizes is free of charge and free of commitment. It is non-binding and does not guarantee availability.
orders
Each piece is crafted in small scale. Some are one-of-a-kind, others available in limited quantities or made to order. Please refer to each product page for availability.
You will receive an order confirmation by email after checkout.
Shipping
Shipping is currently limited to Sweden. All domestic orders ship for free.
In-stock orders are packed and dispatched within 7–14 days, unless stated otherwise. Some pieces are made to order or released in limited batches — see the product page for details.
A shipping confirmation will be sent when your parcel is on its way.
Returns
You have the right to return your purchase within 14 days of receiving it, according to Swedish consumer law.
If you wish to return an item, contact hello@ocaistudio.com in advance. Items must be returned in their original condition and packaging.
Return shipping is paid by the customer.
Once the item is received and approved, a refund will be issued to the original payment method.
Contact
For enquiries, sizing advice, or bespoke requests, please contact hello@ocaistudio.com
sizing
Sizes are presented in EU ring sizes (inner circumference in millimetres). If you measure inner diameter, multiply by π or use the chart below.
Example: EU 54 = 54 mm inner circumference ≈ 17.2 mm inner diameter.
find your size
Measure an existing ring
Place a ring that fits the intended finger on a flat surface.
Measure the inner diameter straight across (inner edge to inner edge).
Convert to EU size: EU size ≈ diameter × π (or use the chart below).
OR
Measure your finger
Wrap a thin strip of paper or thread snugly around the finger where the ring will sit.
Mark where it overlaps, then lay it flat and measure the length in millimetres — this is your inner circumference.
That number is your EU size (or use the chart below to find the closest size).
Practical sizing tips
Measure more than once: Measure 2–3 times and average, to capture fluctuations over the day.
Temperature matters: Heat, exercise, salt and hydration can make fingers swell; cold makes them shrink.
Knuckle vs. base: If your knuckle is larger than the base, measure both and choose a size that can pass the knuckle but still sits comfortably.
Band width: Wide bands fit tighter — consider going ½–1 EU size up for very wide designs.
Between sizes? Size up for comfort.
