Classic Crew
The one that just works.
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Colour note
Product colours may look slightly different in real life depending on lighting, screen settings, and photography.
Important
Verify your size and colour before checkout. Changes aren't accepted once ordered.
Fit tip: For a comfortable fit, try one size up from your usual size. If you normally wear a 40, try L (42) for your preferred fit. Check the size chart to find your perfect size.
The Unofficial Clubs
Unofficial clubs. Very official obsessions.
Overthinking isn't a hobby. It's a full-time membership.
Replayed that conversation 47 times? Analysed a simple text message like a detective? Thought of the perfect comeback three hours too late?
Congratulations. You're already a member.
Welcome to the Professional Overthinkers Association – the unofficial club for people whose brains have 47 tabs open, 12 unfinished thoughts and absolutely no plans to shut down.
Introducing the Overthinkers Club Unisex Oversized T-Shirt – a playful graphic tee for people who turn everyday situations into full-blown mental investigations.
Featuring a fun club-inspired design, this T-shirt is made for those who proudly embrace their overthinking personality.
No application required. Second-guessing everything is qualification enough.
Premium Heavyweight Cotton: Made from 100% cotton with a substantial 240 GSM feel.
Relaxed Oversized Fit: Extra room through the body, added length and dropped sleeves.
Unisex Styling: Designed for anyone whose mind refuses to take a day off.
Personality-Driven Graphic: A conversation starter for fellow overthinkers.
Easy to Style: Pair it with jeans, joggers, cargos or shorts.
Everyday Comfort: Perfect for coffee runs, casual outings, travel and laid-back weekends.
| Feature | Details |
|---|---|
| Fabric | 100% Cotton |
| Fabric Weight | 240 GSM |
| Fit | Unisex Oversized |
| Neckline | Crew Neck |
| Design | Professional Overthinkers Association |
| Style | Funny Graphic Streetwear |
| Sizes | XS–XXL |
| Colours | 14 options |
The Overthinkers Club Unisex Oversized T-Shirt features a relaxed silhouette with roomy sleeves, dropped shoulders and extra space through the body.
Want the intended oversized look? Start with your usual regular-fit T-shirt size.
Prefer an extra-baggy streetwear look? Consider sizing up after checking the size chart.
Fit tip: Compare the measurements with a T-shirt you already own before ordering.
Wash inside out with similar colours.
Use cold water and a gentle wash cycle.
Avoid bleach and harsh detergents.
Air dry in the shade whenever possible.
Turn inside out before ironing and avoid direct ironing over the print.
Some people have everything figured out.
The rest of us are still deciding what to eat, what to wear and whether that one awkward thing we said in 2019 was actually awkward.
If your brain never clocks out, you've found your people.
PROFESSIONAL OVERTHINKERS ASSOCIATION – Membership officially unofficial.
Wear your personality. Only at PROTEEIN.
| Size | Length | Chest | Shoulder | Sleeve Open | Sleeve Length |
|---|---|---|---|---|---|
| XS | 27 | 40 | 18 | 6 | 7 |
| S | 28 | 42 | 19 | 6.5 | 8 |
| M | 29 | 44 | 20 | 7 | 9.5 |
| L | 30 | 46 | 21 | 7.5 | 10.5 |
| XL | 31 | 48 | 22 | 8 | 11.5 |
| 2XL | 32 | 50 | 23 | 8.5 | 12.5 |
PROTEEIN / STYLE YOUR PLAIN TEE
STEP 1 OF 4
Both are everyday tees. The difference is how much room you want.
The one that just works.
The one that gives you room to breathe.
Think Classic = closer to your usual T-shirt fit.
Think Oversized = intentionally more room everywhere.
Classic: “I like my T-shirts to behave.” 👔
Oversized: “I like my T-shirts to have personal space.” 😎

The everyday uniform
Fabric
Premium cotton with a soft, substantial hand feel.
Fit
Relaxed through the body, finished with a clean crew neck.
Colour
A considered palette designed for everyday wear.
Made for
Layering, living, and everything in between.