Worldwide Shipping Available Orders are processed within 1–3 business days and shipping costs are calculated at checkout. Tracking information will be sent once your order has been dispatched.
Estimated Shipping Times Estimated delivery times vary by destination:
USA & Canada: 7–12 business days
Germany & UK: 3–9 business days
Europe: 5–12 business days
Asia Pacific: 10–20 business days
Australia: 8–15 business days
Typical delivery times are 3–12 business days, depending on the destination. Please note that actual delivery times may vary due to customs, carrier delays, or peak shipping periods.
Shipping Protection Shop with confidence — every order is covered by shipping protection from dispatch to delivery. In the event of loss or theft, we offer a full refund or complimentary reshipment.
Shop with confidence — we offer a 30-day money-back guarantee and accept returns within 30 days after delivery for eligible items that are unused, in their original packaging, with tags attached. If your item arrives damaged, defective, or incorrect, please contact us and we’ll work with you to make it right.
For quality-related issues or shipping mistakes on our side, we’ll cover the return shipping cost. Approved refunds are issued to your original payment method within 1–3 business days after inspection.
A relaxed, American-inspired button-up shirt built around bold vertical pinstripes and a contrasting colorblock panel across the upper back and shoulders. Available in two colorways — a crisp white base with navy contrast and a dark brown base with cream contrast — this oversized shirt brings a retro streetwear edge to everyday casual dressing.
Product Highlights
All-over vertical pinstripe pattern with a contrasting woven panel across the upper back yoke and shoulder area
Relaxed oversized silhouette with dropped shoulders and a curved hem for a laid-back, contemporary fit
Classic point collar with a yellow brand label tab at the back neck
Chest patch pocket with a woven logo badge for a workwear-inspired detail
Full button placket with white buttons running the length of the front
Contrast fabric detail at the sleeve cuffs, echoing the back yoke panel for a cohesive design
Fit & Styling
This shirt is cut with an intentionally oversized, boxy fit — size down if you prefer a more relaxed-but-structured look, or wear true to size for a full streetwear drape. The dropped shoulders and wide chest make it ideal to wear open over a graphic tee, or buttoned up and tucked loosely into wide-leg trousers or cargo pants. Both colorways work well across spring and autumn layering. The white version pairs cleanly with navy or black bottoms, while the brown version complements earth-tone palettes and cream or beige accessories.
Product Details
Constructed from a woven cotton-polyester blend — approximately 65% Cotton, 35% Polyester — that gives the fabric a smooth, structured drape with light breathability. The contrasting back yoke and cuff panels use a coordinating woven fabric in a complementary stripe or check texture. Long sleeves with button cuffs. Brand: UNKNOW RETRO. Available in White and Brown, in sizes M, L, and XL.
Size Guide
Use the measurements below as a guide and compare them with a similar item you own.
Size
Length (cm)
Chest (cm)
Shoulder (cm)
Sleeve (cm)
M
72
120
59
56
L
74
124
60
57
XL
76
128
61
58
How to Find Your Perfect Size — Every Time
How to Find Your Perfect Size — Every Time
Struggling to pick a size online? Here's a simple trick: instead of guessing, use a piece of clothing you already own — and love the fit of — as your reference point.
Step 1: Pick Your Reference Item Think of a T-shirt you've bought before that fit you perfectly. Find that order and pull up its size chart.
Step 2: Focus on Two Key Measurements For streetwear-style tees, two numbers matter most:
Chest width— too narrow and it'll feel tight
Length— too long and it'll look sloppy
💡 Tip:Size charts sometimes list "Chest" as theflat-lay widthinstead of the full circumference. Here's how to tell the difference:
Large number(e.g., 49in / 124cm+) → likely the actual chest circumference
Small number(e.g., 24in / 62cm) → likely the flat width (garment laid flat and measured edge to edge)
Step 3: Note Your Ideal Numbers Write down the chest and length measurements from your best-fitting shirt. Care about sleeve length or shoulder width too? Note those down as well.
Step 4: Match to Our Size Chart Now check Seakoff's size chart and pick the size whose measurements are closest to your notes. That's it — no more guessing.
Works for Everything This same method applies to hoodies, sweaters, jackets, and more. Do it once, and you'll be able to shop confidently, anywhere — every time.
