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.
The Seakoff black long sleeve t shirt delivers a bold double-layer look without the bulk. A distressed old-English emblem flanked by a circle of stars anchors the front body, while contrast black-and-grey striped sleeves extend beneath the short-sleeve overlay to create an effortless layered effect. The result is a single garment that reads like two, giving your outfit instant dimension and edge.
Clean Silhouette, Everyday Comfort
Cut in a relaxed silhouette from 100% cotton, this black long sleeve t shirt sits comfortably through the shoulders and chest without feeling oversized. The ribbed cuffs finish the striped sleeves neatly, keeping the layered detail looking intentional rather than thrown together. Whether you are heading out for the weekend or building a casual street-ready look, this piece transitions easily from day to night.
How to Style It
Pair with slim or straight-leg black jeans and chunky sneakers to let the graphic and sleeve contrast do the talking. Layer under an open overshirt or bomber jacket for added dimension in cooler weather. The monochrome black and grey palette keeps outfit building simple and versatile.
Size Guide
S: Length 67 cm | Shoulder 56 cm | Chest 122 cm | Sleeve 57.5 cm | Cuff 19.5 cm M: Length 69 cm | Shoulder 57 cm | Chest 126 cm | Sleeve 59 cm | Cuff 20 cm L: Length 71 cm | Shoulder 58 cm | Chest 130 cm | Sleeve 60.5 cm | Cuff 20.5 cm XL: Length 73 cm | Shoulder 59 cm | Chest 134 cm | Sleeve 62 cm | Cuff 21 cm
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.
