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.
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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.
This men's long sleeve plaid shirt brings a classic workwear aesthetic to everyday casual dressing. Featuring a bold tartan check pattern in your choice of red or blue, the shirt is cut in a relaxed, oversized silhouette that works equally well as a standalone top or a lightweight overshirt. Two large flap chest pockets add functional detail and reinforce the utilitarian design language, while a clean point collar and full button-front placket keep the look polished.
Product Highlights
Classic tartan plaid pattern available in red check and blue check colorways
Two oversized flap chest pockets for a workwear-inspired look and practical storage
Relaxed, boxy fit with dropped shoulders for a contemporary streetwear silhouette
Full button-front closure with tonal buttons throughout
Yoke panel detail on the back adds structured visual interest
Long sleeves with buttoned cuffs for a neat, finished appearance
Fit & Styling
This shirt is designed with a generous, relaxed fit — ideal for layering over a plain tee or wearing open as a light overshirt. The dropped shoulders and boxy cut give it a modern, European streetwear feel. Pair it with slim chinos or straight-leg jeans for a balanced silhouette. The red check works well for bold casual outfits, while the blue check offers a more versatile, everyday option. Refer to the size chart: size M measures 65.5 cm in length, 118 cm chest, 54.5 cm shoulder width, and 59 cm sleeve length.
Product Details
This mens long sleeve shirt with pocket is constructed from a woven cotton-blend fabric that gives the plaid pattern a crisp, structured drape. Material composition: approximately 80% Cotton, 20% Polyester. Available in sizes M through XXL. Point collar. Full button-front placket. Two buttoned flap chest pockets. Buttoned cuffs. Back yoke panel. Machine wash cold.
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
65.5
118
54.5
59
L
67.5
122
56
60
XL
69.5
126
57.5
61
XXL
71.5
130
59
62
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.
