
Clothing Size Chart
All items are unisex, pre-shrunk, and follow US/EU sizing (not Asian sizing).
For a true-to-size fit, order your usual size.
For an oversized fit, size up by one.
T-Shirt Size Chart
Please note there may be a manual measurement error of 1–3 cm.

How we measure:
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Length: From the highest point next to the neckline straight down to the bottom hem.
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Chest: Shirt laid flat; measure from one armpit to the other with the fabric smooth.
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Sleeve: From the shoulder seam to the end of the sleeve, keeping the sleeve straight and flat.
Secure Checkout
Fast ShippingDescription
Professionally overthinking. Since always. Certified by no one. Completely accurate.
The Professionally Overthinking Japanese Koi T-Shirt is for the person whose brain simply will not stop. You've analyzed the conversation from last week. You've mapped out seventeen potential outcomes of the email you haven't sent yet. You've run the scenario three more times just to be sure. This isn't a problem — it's a skill set. A poorly-branded one, but still.
The koi graphic adds the layer this kind of shirt needs: the koi moves through turbulent water with a kind of determined calm. It doesn't stop swimming because the current is complicated. It adjusts and keeps going. Which is exactly what you do, just internally, at 2am, while everyone else is asleep.
For the overthinkers, the planners, the people who need to be told it's okay to feel things deeply and think about them thoroughly. It is. This shirt confirms it. Soft, comfortable, and the exact kind of humour that lands for people who recognize themselves in it immediately — which is the best kind.
Washing Instructions
Machine wash cold (30°C / 86°F) with similar colors
Do not bleach
Tumble dry on low heat or lay flat to dry
Iron on low heat if needed
Do not dry clean
Shipping & Returns
Free Shipping
Enjoy free shipping on all orders over $75. No code needed — the discount is applied automatically at checkout.
Easy 30-Day Returns
We want you to love what you ordered. If you're not completely satisfied, we accept returns within 30 days of delivery — no hassle, no stress.
Return Conditions
To be eligible for a return, items must be:
- Unworn and unused
- In their original packaging
- In the same condition as received
If your return meets these conditions, simply reach out to our support team and we'll guide you through the process.