The ASSEMBLY LINE • Oversized Shirt Sewing Pattern (XS - 3XL)
Printed sewing pattern • Sizes XS–3XL • Skill level: Intermediate
The Oversized Shirt Sewing Pattern by The Assembly Line is a contemporary interpretation of a timeless wardrobe staple. Designed in Sweden, this relaxed shirt combines clean Scandinavian lines with thoughtful details, creating an effortlessly wearable garment that can be styled as either a classic shirt or a modern shirt dress.
The design features an oversized silhouette with dropped shoulders and a box pleat at the back, adding ease of movement and a beautifully relaxed fit. Discreet side seam pockets enhance its practicality, while the choice of a traditional shirt collar or a minimalist stand-up collar allows you to personalise the finished garment. The length can also be easily adjusted, giving you the flexibility to create a shorter shirt or a longer shirt dress from the same pattern.
Designed for light to medium weight woven fabrics, the Oversized Shirt is a versatile pattern you'll return to throughout the year.
Perfect for:
- Relaxed shirts and shirt dresses with modern Scandinavian styling
- Intermediate sewists looking to develop classic shirt-making skills
- Versatile wardrobe staples for everyday wear
- Light to medium weight woven fabrics with beautiful drape
Skill level • Intermediate
Pattern details:
- Printed sewing pattern with clear, step-by-step instructions
- Sizes XS–3XL included
- Oversized relaxed fit
- Dropped shoulders
- Rear box pleat for ease and movement
- Choice of classic shirt collar or stand-up collar
- Adjustable length for a shirt or shirt dress
- Discreet side seam pockets
Suggested fabrics: This pattern works best in light to medium weight woven fabrics such as:
- Cotton poplin and lawn
- Linen
- Tencel
- Crêpe de Chine
- Wool crepe
Choose crisp fabrics for a more architectural silhouette or softer fabrics for a fluid, relaxed drape.
Fabric requirements • Please see last image for fabric requirements.
You will also need:
- Matching thread
- 11 shirt buttons (approximately 10mm diameter)
- Fusible interfacing
Sewing tips:
- Take time when sewing the collar and button placket to achieve a crisp, professional finish
- A washed linen creates a relaxed everyday shirt, while cotton poplin gives a cleaner, more structured silhouette
- Consider lengthening the pattern to create a versatile shirt dress that layers beautifully throughout the seasons
Why we recommend this pattern: The Oversized Shirt is a versatile modern classic that combines timeless shirt-making with contemporary Scandinavian design. With multiple styling options included, it's a pattern you'll enjoy sewing in a variety of fabrics and wearing for years to come.
Part of our curated collection of The Assembly Line sewing patterns, designed for modern, wearable wardrobes.
Browse our full collection of sewing patterns for modern handmade wardrobes.
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