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A classic Fair Isle sweater vest reimagined for modern streetwear. This sleeveless V-neck cardigan from INS ERROR features an all-over diamond and geometric jacquard pattern in deep burgundy, cream, and sky blue, with a clean solid burgundy back panel. Button-front closure, dual front patch pockets, and ribbed hem and armhole trim give it a polished, vintage-inspired finish that works equally well layered or worn alone.
Product Highlights
All-over Fair Isle diamond jacquard pattern on the front; solid burgundy reverse
Deep V-neck with clean ribbed trim for a sharp, flattering neckline
Button-front closure with four tonal brown buttons
Two front patch pockets for casual utility
Ribbed hem and armhole edges for a neat, structured silhouette
Sleeveless cut ideal for layering over shirts or turtlenecks in spring and autumn
Fit & Styling
This vest is cut with a relaxed, slightly oversized streetwear fit — true to the INS ERROR aesthetic. It layers naturally over a long-sleeve shirt, Oxford, or turtleneck for a preppy-meets-street look. The cropped-to-hip length keeps proportions balanced with straight-leg or wide-leg trousers. Size M measures 62 cm in length and 116 cm chest; size L is 64 cm length and 120 cm chest; size XL is 66 cm length and 124 cm chest. If you prefer a closer fit, size down one.
Product Details
Fabric: approximately 80% acrylic, 20% wool blend — a mid-weight knit construction that provides warmth without bulk, typical of Fair Isle jacquard vests of this style. Color: Burgundy (deep red with cream and blue jacquard). Brand label: INS ERROR. Sleeve type: sleeveless. Closure: button-front. Season: spring, autumn.
Size Guide
Use the measurements below as a guide and compare them with a similar item you own.
Size
Length (cm)
Chest (cm)
Shoulder Width (cm)
M
62
116
40.5
L
64
120
41.5
XL
66
124
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.
