Under Water × Sea World – Calm Ocean Wall Art Set

Under Water × Sea World – Calm Ocean Wall Art Set

Create a calm and dreamy atmosphere in your home with this curated wall art set featuring Under Water and Sea World.

Under Water is one of our best-selling posters, loved for its soft colours, floating jellyfish and peaceful underwater mood.
Sea World is designed as a natural companion, adding playful seahorses and warm tones while maintaining the same calm and harmonious expression.

Together, the two posters form a balanced and cohesive wall set that brings colour, softness and personality into the room without overwhelming the space. Ideal for bedrooms, living rooms, children’s rooms or any place where you want a relaxed, soothing feel.

The posters work beautifully displayed side by side, but can also be styled separately. You can freely choose the sizes to fit your wall and your personal style.

Printed in Denmark on high-quality art paper.

Our posters are printed on 250 gsm silk paper — a strong, wood-free quality paper with a beautiful semi-matte surface that enhances colours and details without glare. Silk paper is often used for art prints and photography because it delivers soft, natural and precise colour reproduction.

Most posters on the market are printed on 170 gsm paper, but we choose to go a step further. We use 250 gsm because we only want to send out something we would proudly hang in our own home. The extra thickness gives a more solid feel, richer colour depth and a quality that truly lasts.

The paper is Nordic Swan Ecolabelled and FSC-certified, and finished with genuine offset printing and water-based varnish — a combination usually found in far more expensive prints.
At HelloPoster, this means you get premium quality at a price that’s still accessible.

Approximate dimensions (depending on selected sizes)

As you choose the sizes yourself, the overall dimensions will vary. As a guideline:

Example with 50 × 70 + 50 × 70 cm:
Width: approx. 110–120 cm
Height: approx. 70–80 cm

Example with 30 × 40 + 50 × 70 cm:
Width: approx. 80–95 cm
Height: approx. 70–80 cm

(A spacing of 3–5 cm between frames creates a calm, balanced look. The frame adds approx. 1.5–2 cm per side.)

Use painter's tape for a perfect alignment:

Lay all frames on the floor in your preferred layout.
Place a long strip of tape across the top edges where the hooks sit.
Mark each nail position directly on the tape.
Stick the tape onto the wall — perfectly level.
Hammer the nails into the marked spots.
Remove the tape and hang the frames.

A simple method for a clean, perfectly aligned gallery wall — every time.

Fast delivery

We strive to ship your order from our warehouse within 24 hours – and always guarantee dispatch within 2–3 business days.

Shipping within Denmark costs 49 DKK with GLS parcel shop.

Free shipping over 399 DKK or 4+ posters (Denmark only)

Easy and secure returns

You have a full 14-day return right.

Simply contact us at hello@helloposter.com if you wish to return your order.

Important: Uncollected parcels are not considered valid cancellations, and you cannot cancel a purchase by refusing delivery.

A return handling fee of 49 DKK will be deducted from your refund.

Returns

All return items must be sent directly to our address – not to a parcel shop.

Uncollected orders are also not considered returns; in these cases, the buyer covers the return shipping cost of 49 DKK.

For orders that included free shipping, the actual shipping costs we incurred will be deducted from your refund.

The buyer always covers return shipping costs.

Please note that we do not accept parcels sent as “cash on delivery.”

To ensure fast processing, please contact us at hello@helloposter.com before returning your order.