Standard sizing charts in magazines and digital shops are drafted using averaged body measurements. In reality, most people have unique body proportions: differences between bust and hip measurements, broad or narrow shoulders, a hollow lower back, or asymmetrical posture. As a result, a garment made from a standard pattern often twists, pulls at the armscye, or bunches across the back. At vykroyka.com.ua, we explore professional techniques for altering patterns to fit non-standard figures while maintaining structural garment balance.
1. Adjusting for Non-Standard Bust Sizes (FBA & SBA)
One of the most common fitting dilemmas occurs when a bodice fits cleanly across the shoulders, but is significantly too snug over the bust, or conversely, leaves excess, gaping fabric.
Full Bust Adjustment (FBA):
Simply widening the side seams will distort the armscye and make the neckline and shoulder lines excessively broad.
The Solution: On the front bodice paper pattern, cut along lines running from the armhole and existing dart apex toward the bust apex. Spread the pattern sections apart by exactly half of your total bust circumference difference. This opens up a new, deeper bust dart while keeping shoulders and neckline unchanged.
Small Bust Adjustment (SBA):
The inverse technique is applied: excess pattern volume is removed by overlapping cut sections or rotating extra fullness out of darts or princess seams, preventing a flat, baggy drape.
2. Narrow and Broad Shoulder Alterations
The shoulder line dictates how blazers, coats, and dresses hang. When the garment shoulders don't match your bone structure, clothes either droop or bind your movement.
Narrow or Sloping Shoulders:
If the shoulder seam falls down past your natural shoulder point and diagonal wrinkles form toward the armscye, raise the shoulder point slightly on both front and back panels, or narrow the shoulder width inward toward the neckline.
Broad or Square Shoulders:
If the fabric strains uncomfortably between the neck base and armhole, extend the shoulder seam outward and flatten the shoulder angle slightly to mirror your body's natural slope.
3. Swayback Alteration (Hollow Lower Back)
Figures with a pronounced lordosis (inward lumbar curve) frequently experience unsightly horizontal pooling of fabric across the lower back and excess volume around the back waist.
How to Fix It:
- Pinch out a horizontal wedge-shaped fold on the back bodice or skirt pattern right across the waistline, tapering to zero at the side seams.
- Deepen the back waist darts or curve the center back seam gently to trace the contour of the lumbar spine, eliminating the unsightly bunch of extra fabric.
4. The Golden Rule of Pattern Fitting: Slash and Spread
Never attempt to modify a flat pattern "by eye" by simply hacking off edges during cutting. Professional pattern adjustments are executed using the Slash and Spread method: slice your paper sloper along defined anatomical axis lines, slide the pieces by exact millimeter increments, and tape tissue paper underneath, smoothing and trueing all seam transitions.
Never cut into fine fashion fabric before sewing a test muslin (toile). Basting a quick mock-up from inexpensive calico or muslin allows you to verify dart depth, armhole contouring, and waistline placement directly on the body before final cutting.
Mastering pattern adjustments transforms garment sewing from guesswork into an exact craft. Find more in-depth tutorials and ready-to-sew patterns on the homepage at vykroyka.com.ua.
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