ABOUT THE BRAND

COS I SAID SO® is an Antwerp-based brand founded in 2016 by boys’ mom Sofie Ysewijn.
What started as a small idea for cool, comfy basics has grown into an international label — stocked in some of the world’s most inspiring stores and represented on Smallable.

We design timeless, seasonless essentials that last.
Each piece is made from organic cotton, produced responsibly in Portugal under fair working conditions.
We’re conscious about what we make and how we make it — avoiding overproduction and using recyclable and biodegradable packaging wherever possible.
Just quality, always.

COS I SAID SO stands for easy fits, clean silhouettes, and a genderless aesthetic that moves effortlessly from toddler to teen.
A simple, street-style vibe that feels cool without trying too hard.

GRAPHICS THAT SPEAK

Our hand-drawn graphics are what make COS I SAID SO instantly recognizable.
They’re original, meaningful, and a little bit cheeky — with good quotes that resonate with parents and fun, likeable drawings that kids love.
Every print carries a strong message — sometimes bold, often funny, always real.
That’s our signature: graphics with personality, designed to make you smile and think.

MORE THAN A LABEL

COS I SAID SO is a mindset.
A community.
Because cos i said so means you stand for something.
You’re a vibe, not a type.
A voice, not an echo.

We create a space where you can feel like you belong — and yes, we even made a Spotify playlist.

BEHIND THE BRAND

Alongside COS I SAID SO, Sofie shares her experience through SHOW UP —
a course for brand owners who feel stuck, overwhelmed, or unsure how to grow.
It’s for dreamers who want to start, makers who already have a product,
and doers who are ready to finally market and sell it with confidence.

She also offers Power Hours — one-on-one brainstorm sessions designed to help you find clarity, direction, and energy to take your brand to the next level.
Because growth doesn’t have to come from competition — it comes from abundance.

Sofie runs her business on her own terms — guided by intuition, creativity, and balance.
Over the years, she’s become an expert at following her gut and steering her brand with purpose,
while keeping space for what matters most: her kids, her family, and a good life beyond the business.

SHOW UP and the Power Hours are built on years of real-world fashion, branding, and business experience —
real stories, real lessons, and everything Sofie wishes she’d known when she started out.

"When you buy from a small brand, an actual person does a happy dance."

Our office
Londenstraat 30
2000 Antwerp, Belgium