Cosmic Wave Mermaid Poster framed in a natural wood frame

Illustrated poster of a cowgirl mermaid surfing a wave with a lasso under the words ride your own cosmic wave

WHY27? — Boho Wall Art for Kids

Cosmic Wave Mermaid Poster

€24,90

Size:

Size guide

Which size fits your wall?

We print in thirteen sizes, in four different shapes. Start by choosing the shape that suits your wall, then pick the size.

Portrait — the classic shape

Slightly taller than it is wide. The safest choice for most walls.

Size	Inches	Best for
20 × 25 cm	8 × 10"	Shelves, bedside nooks, small gallery walls
30 × 40 cm	12 × 16"	Above a changing table or a small dresser
40 × 50 cm	16 × 20"	Our most popular. Above a cot
50 × 70 cm	20 × 28"	A statement piece above a bed

Tall portrait — for narrow walls

Longer and slimmer. Perfect where width is tight and height isn't.

Size	Inches	Best for
21 × 29.7 cm	8 × 12"	Between two doors, beside a window
30 × 45 cm	12 × 18"	Narrow spaces, hallways
40 × 60 cm	16 × 24"	Tall empty walls
60 × 90 cm	24 × 36"	One wall, one poster, nothing else needed

A-series — standard European frames

The sizes every high-street frame shop stocks. If you already have a frame, it's probably one of these.

Size	Best for
A3 — 29.7 × 42 cm	The easy choice. Fits any off-the-shelf frame
A2 — 42 × 59.4 cm	Above a dresser or a desk
A1 — 59.4 × 84.1 cm	Full-wall statement

Square

Size	Inches	Best for
40 × 40 cm	16 × 16"	Gallery walls, above a cot, pairs and trios

Which size for which wall

Above a cot — 40 × 50 cm on its own, or two 20 × 25 cm side by side. Never hang a glass frame directly over a cot.

Above a single bed — 50 × 70 cm centred, or three A3s in a row.

Above a dresser or changing table — A2, or a pair of 30 × 40 cm.

A gallery wall — mix sizes and shapes. Start with one large piece as the anchor, then build around it with smaller ones. Squares work beautifully as fillers.

A narrow wall, or between two doors — 21 × 29.7 cm or 30 × 45 cm. Anything wider will feel crowded.

A whole empty wall — 60 × 90 cm or A1, alone. Don't add anything else.

The rule that never fails

Your art should be about two thirds the width of the furniture below it. A 120 cm dresser wants roughly 80 cm of art — one A1, or two 40 × 50 cm side by side with a gap between them.

And hang it lower than you think. Galleries hang at 145 cm from the floor to the centre of the picture, but in a child's room, dropping it to about 120 cm means they can actually see it.

The two-minute trick

Cut a piece of paper to the size you're considering and tape it to the wall for a day.

It sounds too simple to matter, and it's the single best way to avoid ordering the wrong size. Live with it for an afternoon and you'll know straight away whether it's too small.

Frames

Our posters are sold unframed and printed on 200-gsm premium matte paper.

A3, A2 and A1 are European standards, so any high-street frame will fit — IKEA, Søstrene Grene, HEMA and most online frame shops stock them. The centimetre sizes are the international standards used by most frame retailers.

Need a size that isn't here?

We can print custom dimensions. Write to hello@why27lab.com with the size you need and we'll sort it out.

Still hesitating between two?

Send a photo of your wall to hello@why27lab.com and we'll tell you which one we'd choose. A real person replies within 2 working days.

Variant

Museum-quality giclée print on 200gsm fine art paper

Printed locally in the US, UK, EU and Australia

Description

A mermaid surfs a rolling wave on a pink board, swinging a lasso above her head in a flower-trimmed cowboy hat, fringed vest and leopard print tail, her pastel hair flying behind her. Above, hand-lettered words read ride your own cosmic wave, and a coral border of painted starfish frames the whole thing. It brings spark and independence to nurseries, bedrooms, playrooms, and creative family spaces.

Created on iPad Pro during quiet moments of motherhood, this print celebrates making your own path instead of waiting for the right wave to arrive. Periwinkle blue, coral and dusty purple sit together under a hand-painted starry texture, with the cream lettering keeping the message readable from across the room. The painted border makes it feel complete on its own, so it works as a single statement piece above a bed.

Museum-Quality Giclée Print

12-colour Giclée printing — the standard used by museums and galleries, for crisp detail, smooth gradients and true-to-original colour
Enhanced Matte Art paper — a heavyweight 200 gsm fine art stock with a smooth, clean finish
Archival pigment inks — rich, vibrant colour built to last over 100 years in ideal indoor conditions
Glare-free matte finish — brings out every highlight and tone of the illustration
Natural white tone — keeps colours beautifully consistent from print to print

Included in Your Purchase

Available in a wide range of standard sizes, from 8×10" (20×25 cm) up to 60×90 cm (24×36"), including the popular 50×70 cm option
Carefully packaged for safe delivery
Unframed print (frame not included)
Printed locally for faster and more sustainable shipping

Why Families Love It

Timeless design that grows with your child
Adds warmth, playfulness, and style to nurseries, playrooms, or bedrooms
Hand-drawn and hand-painted by the artist
A perfect gift for birthdays, baby showers, or room updates

Usage & Copyright

All artwork is original and part of the WHY27? collection
For personal use only. Reproduction, resale, or commercial use is not allowed
Please note: Frame not included. Colors may vary slightly due to screen and print differences

Shipping & Delivery

Printed near you using sustainable practices via our global print partner
Production time: 1–3 business days
Estimated delivery: 2–6 business days depending on your location
Tracking number provided once your order is shipped

Hand-drawn, never AI

Every illustration painted by hand on an iPad — no templates, no generators.

Worldwide shipping

Printed on demand and sent from the facility closest to you.

200-gsm premium matte paper

Made to outlast childhood.

Pay however you like