How to Resize a Sewing Pattern to Fit Your Body
Very few people fit perfectly into a single pattern size — and that's completely normal. Learning how to resize a sewing pattern is the single most important skill for getting garments that actually fit your body. This guide covers the most common adjustments: grading between sizes, lengthening and shortening, and full bust adjustments.
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Why Pattern Resizing Matters
Commercial sewing patterns are drafted for a standard body that doesn't actually exist. Your bust might be a size 14, your waist a 16, and your hips a 12. Grading between sizes — blending from one size line to another — gives you a custom fit without drafting a pattern from scratch.
Step 1: Take Accurate Measurements
Measure yourself wearing the undergarments you'll sew with. You need: high bust, full bust, natural waist, and full hip. Compare these to the pattern's size chart — not ready-to-wear sizing. Write down which size you are at each measurement point.
Step 2: Grade Between Sizes
If you're different sizes at bust, waist, and hip, draw a smooth curve that transitions from one size line to the next. Start at the bust and blend gradually to the waist, then from the waist to the hip. Most multi-size patterns print the size lines close together, making this straightforward.
Pro tip
Use a curved ruler (French curve) for smooth grading lines. A straight ruler creates angular transitions that affect the drape of the finished garment.
Step 3: Lengthen or Shorten
Most patterns include a “lengthen/shorten here” line. To shorten, fold the pattern along this line by the amount you need to remove. To lengthen, cut along the line and spread the pieces apart, taping paper behind the gap. This works for bodice length, skirt length, and sleeve length.
Step 4: Full Bust Adjustment (FBA)
If your full bust measurement is more than 2” larger than your high bust, you likely need a full bust adjustment. An FBA adds volume at the bust without changing the shoulder, waist, or hip fit. It's the most common pattern alteration — and the one that makes the biggest difference in fit.
Step 5: Make a Muslin
After making your adjustments on paper, sew a test version (muslin or toile) in cheap fabric. Fit it on your body and mark any remaining adjustments. Transfer these back to your pattern. This step saves expensive fabric and frustration.
Patterns that fit your body
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