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.
This oversized black long-sleeve tee from MT99 delivers a bold American street-rock aesthetic through a clever faux-layered construction. The body is a clean black cotton-feel shell, while the sleeves are cut from a contrasting grey-and-black horizontal stripe fabric — giving the look of two separate pieces in one easy pullover. The front chest carries an embroidered British royal crest with flanking lions and a Union Jack shield, while the back is dominated by a large distressed Union Jack flag print above stacked slogan text reading "Growing In The World, Make True, Have MT99" in mixed serif and script lettering.
Product Highlights
Faux two-piece design: solid black body with grey striped contrast sleeves for an effortless layered look
Embroidered royal crest with Union Jack shield and golden lion motifs on the left chest
Large distressed Union Jack flag graphic across the upper back
Mixed-font slogan print on the back lower panel in white and red
Relaxed oversized silhouette with a ribbed crew neck
Available in sizes M, L, and XL with a generous chest measurement starting at 124 cm
Fit & Styling
The shirt is cut in an oversized, boxy silhouette that sits comfortably on the shoulders and through the body. The size chart recommends M for heights 165–175 cm and weights 55–65 kg, L for 170–180 cm / 60–70 kg, and XL for 175–185 cm / 70–80 kg. Pair it with slim or straight-leg black jeans and chunky sneakers to lean into the British punk-meets-American streetwear vibe. The faux-layer sleeve detail means no extra layering is needed — wear it as a standalone statement piece.
Product Details
Color: Black with grey stripe contrast sleeves. Fabric: 100% Cotton. Construction features a pieced sleeve panel in a horizontal stripe knit fabric joined to a plain-weave body. Crew neckline with ribbed collar. Embroidered crest on front; screen-printed graphics on back. Machine wash cold, hang dry recommended. Brand: MT99.
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
68
124
57
51
L
69
128
59
52
XL
70
132
61
53
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.
