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 laid-back take on the classic plaid shirt, this long-sleeve button-up brings a Korean campus-inspired aesthetic to everyday dressing. The fine small-scale check pattern, relaxed oversized silhouette, and subtle woven brand patch on the chest pocket give it a vintage-leaning, effortlessly cool look that works equally well worn open as a light layer or buttoned up on its own.
Product Highlights
Small-scale plaid check pattern in a muted, vintage-inspired palette
Relaxed oversized fit with a curved hem for a casual, unlocked silhouette
Left-chest patch pocket with a woven logo badge detail
Classic point collar and snap-style buttons throughout
Back yoke panel with box pleat for added ease of movement
Available in three colorways: Light Blue, Royal Blue, and Orange
Fit & Styling
Cut with an intentionally relaxed, slightly boxy fit that sits comfortably on the shoulders without feeling oversized. The curved hem keeps proportions clean whether tucked or untucked. Style it open over a plain white tee and straight-leg jeans for a campus-ready look, or button it fully and pair with wide-leg trousers for a more polished take. The muted plaid tones make it easy to layer under a heavier jacket in cooler months. Sizing runs generously — refer to the size chart and consider your preferred fit before ordering.
Product Details
This blue plaid flannel shirt is constructed from a lightweight woven fabric, estimated at 100% Cotton, giving it a soft hand feel and breathable wear. Point collar, full button placket with snap-style buttons, single chest patch pocket, back yoke with box pleat, and long sleeves with buttoned cuffs. Available in sizes M through XXL.
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
70
128
57
60
L
72
132
58
61
XL
74
136
59
62
XXL
76
140
60
63
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.
