Fabric Selection for Full Busts
Stretch fabrics — jersey, knit, stretch woven — give more forgiveness on a full bust and are more forgiving of fitting errors. Woven fabrics with no give require precise pattern adaptation. For first full-bust projects, choose a medium-weight jersey with 50% stretch — it will accommodate minor fitting errors while still looking intentional.
Always Make a Muslin
Before cutting your fashion fabric, make a test garment from inexpensive cotton in the same weight class as your fashion fabric. This is where you make all your fitting adjustments — FBA, dart repositioning, seam corrections — before committing to expensive material. A muslin is not wasted time; it is the difference between a fitting success and an expensive failure.
The Full Bust Adjustment
The FBA adds width at the bust apex without changing the shoulder, neckline, or waist. Measure the difference between your high bust and full bust. Slash the pattern at the apex, spread by that amount, retrue the dart. Apply to all fitted bodice front pieces.
Seam Allowances
Use generous seam allowances — 5/8 inch minimum — on fitted pieces to give yourself room to adjust. Mark the original stitching line so you can grade back where the fit is already good.
Built-In Support
Sewing boning channels and cup pockets into garment linings creates built-in support that eliminates the need for a separate bra. This is the most reliable approach for fitted, strapless, or structured garments.
