A strappy bustier top is a stylish wardrobe staple that combines structure with feminine details. Features like shaped cups, a fitted silhouette, delicate straps, and decorative trims create a flattering garment that's perfect for summer outfits, vacations, parties, and layering. Sewing a bustier top is also a rewarding project that introduces techniques such as smocking, cup construction, gathering, and hook-and-eye closures.
The Winslet's Piper Strappy Bustier Top Sewing Pattern is an elegant intermediate-level project designed to help you create a beautifully fitted crop top. Featuring a frill neckline, shaped bust cups, adjustable knotted shoulder straps, a smocked back panel, and a front hook-and-eye closure, this pattern combines refined construction with a comfortable fit.
Why Sew a Strappy Bustier Top?
A handmade bustier top is a versatile garment that combines elegant styling with practical construction techniques.
- Fitted crop silhouette creates a flattering shape.
- Frill neckline adds a soft, feminine detail.
- Shaped bust cups provide structure and definition.
- Knotted shoulder straps allow for an adjustable fit.
- Smocked back panel offers flexibility and comfort.
- A rewarding project that introduces smocking, cup construction, gathering, straps, and hook-and-eye closures.
Why Choose the Winslet's Piper Strappy Bustier Top Sewing Pattern?
The Piper Strappy Bustier Top is designed for sewists who want to create an elegant fitted crop top with beautiful design details and professional finishes.
Skill Level: Intermediate
Key Features
- Frill neckline.
- Crop bustier silhouette.
- Knotted shoulder straps.
- Shaped bust cups.
- Smocked back panel.
- Front hook-and-eye closure.
Available Sizes: US 02 - US 32 | UK 06 - UK 36 | EU 36 - EU 64
Supplies & Notions
Prepare the following before you begin sewing:
- Main fabric
- Hook and eye
- Elastic thread
- 3-ply polyester thread
- Sewing machine
- Tape measure
- Fabric shears
- Pins
- Sewing needles
- Iron
- Chalk
- Thread cutter
Fabric Recommendations
This pattern is designed for lightweight woven fabrics.
Recommended fabrics include:
- 100% cotton
- Cotton blend
- Cotton twill
- Silk blend
- Crepe
- Georgette
- Viscose
Sample Fabric Used
The sample top shown in the sewing guide is made from polyester crepe, which is recommended because it is:
- Breathable, lightweight, and soft.
- Comfortable to wear in a variety of climates and drapes well on the body.
- Effective at moisture wicking.
- Machine washable in cold water and tumble dry on a low heat setting.
- Crease-resistant.
- Easy to iron.
Size Charts
Check the size charts and measure yourself to select the correct size, using the garment and body measurement tables in the guide.
Verify how much fabric you need by referencing the fabric yield table in the guide.
Pattern Inventory: What Pieces to Prepare
Prepare the following pattern pieces before cutting your fabric.
- A. Front Side – Cut 4 fabric
- B. Front Center – Cut 4 fabric
- C. Front Side Cup – Cut 4 fabric
- D. Front Center Cup – Cut 4 fabric
- E. Front Top Neck – Cut 4 fabric
- F. Back Smocking Block – Cut 1 fabric
- G. Side Back – Cut 4 fabric
- H. Neck Frill – Cut 2 fabric
- I. Strap – Cut 2 fabric
- J. Center Back Smocking Ready – Use to measure the correct smocking panel size after sewing the smocking block.
If you're printing at home, use the A4/US Letter pattern.
If you're using a copy shop, use the A0 pattern.
Pattern Marking
Before cutting your fabric, familiarize yourself with the markings shown on each pattern piece.
The pattern includes markings for:
- Grainline
- Seam allowance
- Side seam
- Front panel notch
- Panel seam
- Back panel notch
- Back across
- Center front
- Center cup notch
- Top cup line
- Cup line
- Frill seamline
- Cup notch
- Hem
- Hemline
The pattern also includes the Center Back Smocking Ready guide, which is used to measure the correct size of the smocked back panel after shirring.
Cutting Layout
Arrange your pattern pieces according to the cutting layout provided for your chosen fabric width.
Keep these guidelines in mind:
- Position every pattern piece so the grainline arrow runs parallel to the fabric selvage.
- Pin the pattern pieces securely before cutting for greater accuracy.
- The layouts shown are intended for non-directional fabrics.
- Purchase additional fabric if you're using fabrics with a nap or directional prints.
- The cutting layouts shown use the small size for illustration.
- Separate cutting layouts are provided for 45-inch and 60-inch fabric widths.
Fabric Cutting and Preparation
Preparing your fabric before sewing helps ensure accurate cutting and professional-looking results.
Lay Out Your Pattern Pieces
Arrange the pattern pieces according to the cutting layout diagrams, ensuring each grainline arrow runs parallel to the fabric selvage.
Cut Your Fabric
If you're using fabric shears, trace around the pattern pieces before cutting. Remove any pen, pencil, or chalk lines as you cut, and remember to clip all notches, as these markings help align the pieces accurately during assembly.
Transfer Pattern Markings
Transfer all markings, including circles, buttonholes, and fold lines, onto the wrong side of the fabric using chalk or another suitable marking tool. Mark the center front of pieces cut on the fold to help align the garment accurately during sewing.
Seam Allowance
Use the seam allowances marked on each pattern piece. These are provided specifically for accurate construction.
This pattern uses a 1 cm (0.38 inch) seam allowance all around and a 3.81 cm (1.5 inch) seam allowance all around the back smocking block.
Step-by-Step Sewing Instructions
1. Prepare the Back Smocking Block
Fold the top edge of the Back Smocking Block (Pattern F) toward the wrong side by approximately 1 cm.
Press the fold and sew along the edge to finish the raw edge.
2. Create the Smocked Back
Prepare the Back Smocking Block (Pattern F) using elastic thread as the looper thread for lock stitching.
Reduce the thread tension on your sewing machine and test the settings on a scrap piece of fabric before sewing the garment.
Ensure there is enough elastic thread on the spool, as interrupted stitching can affect the smocking result.
Mark evenly spaced stitching lines across the smocking block. The sample garment uses 19 rows of smocking, but you may add more or fewer rows if desired.
Sew each smocking row, securing both ends with a few backstitches. The fabric will gather naturally after stitching.
3. Trim the Smocking Block
Allow the smocked fabric to relax without stretching it.
Using the Center Back Smocking Ready (Pattern J) as a guide, trim the smocked panel to its finished size.
Transfer the back panel notches from the pattern onto the prepared smocking block.
4. Prepare the Shoulder Straps
4a.
Place the two Strap (Pattern I) pieces with their right sides together.
Sew 0.25 inches from the raw edge across one short end.
4b.
Spread the seam allowance open and press.
4c.
Fold the strap in half lengthwise with the wrong side facing outward.
Press to create a crease.
4d.
Sew 0.25 inches from the raw edge along the long side.
4e.
Turn the strap right side out using a loop turner.
Cut the finished strap into two pieces according to your preferred shoulder tie length.
Alternatively, cut the back strap 2 inches longer than the front strap.
5. Assemble the Back Panel
5a.
Place one prepared strap on the right side of one Side Back (Pattern G) piece along the back panel seam.
5b.
Place the second Side Back piece over the strap with its wrong side facing the strap, sandwiching the strap between the two side back pieces.
5c.
Align the edges and sew along the back across seamline.
Repeat the same process for the remaining strap and side back pieces.
5d.
Insert the prepared Back Smocking Block between the completed side back panels.
Match the center back notch.
5e.
Sew along the side center back seamline.
5f.
Turn the side back panels right side out and press the across back seamline.
5g.
Repeat the same process for the opposite side of the smocking block.
6. Finish the Back Hem
Fold the hem seam allowance toward the wrong side and press.
Sew along the folded edge to finish the hem neatly.
7. Prepare the Neck Frill
7a.
Fold each Neck Frill (Pattern H) lengthwise with the right side facing outward.
Press flat.
7b.
Set the sewing machine to a 5–7 mm stitch length.
Sew along the open edge using a basting stitch.
7c.
Tie the thread at one end.
Pull the opposite thread to create even gathers.
Repeat the same process for the second neck frill.
8. Prepare the Bust Cups
8a.
Place one Front Side Cup (Pattern C) and one Front Center Cup (Pattern D) with the right sides together.
Match the cup notches and sew along the mid-cup seamline.
8b.
Spread the seam allowance open and press the cup to create its shape.
8c.
Place one Front Top Neck (Pattern E) piece onto the prepared cup with the right sides together.
Match the center cup notch to the mid-cup seamline.
Pin in place.
8d.
Sew the pieces together.
8e.
Open the upper front piece and press the seam smooth.
Repeat the same process for the second cup.
9. Assemble the Front Panels
Place one Front Side (Pattern A) and one Front Center (Pattern B) with their right sides together.
Match the front panel notches and sew along the panel seamline.
Repeat the same process for the second front panel.
10. Attach the Cups
Place one prepared cup onto the corresponding prepared front panel with the right sides together.
Match the end of the mid-cup seamline to the panel seam.
Align the cup lines, pin, and sew along the seamline.
Turn the pieces right side out from the sewn seam and press.
Repeat for the second front panel.
11. Finish the Front Panels
11a.
Place one strap end at the mid-cup seamline.
11b.
Align the gathered neck frill along the top edge of the prepared front panel and pin in place.
11c.
Place the second prepared front panel over the neck frill, aligning all edges.
Pin everything together.
11d.
Sew along the top edge, center front, and hem seamlines.
11e.
Clip the seam allowance where needed.
Turn the front panel right side out.
Use a point turner or similar tool to shape the corners neatly.
12. Complete the Bustier Top
Sew along the top edge of the front panel with the seam allowance pressed underneath to understitch the neck frill.
Place the prepared front panel and the back panel with their right sides together.
Align the side seams, pin, and sew.
Repeat for the opposite side.
Prepare the eye cover by cutting a rectangle matching the center front length and 2.5 inches wide. Fold it lengthwise with the right sides together, sew both short ends, turn it right side out, press, and finish the remaining raw edge with a zigzag stitch (preferred) or a lock stitch.
Position the prepared eye cover along the center front of the right front panel. Sew approximately 1 cm from the edge, spread it open, press, and understitch it to create a neat finish.
Finally, sew seven evenly spaced hook-and-eye closures along the center front to complete the Piper Strappy Bustier Top.
Ready to Sew Your Own Strappy Bustier Top?
A handmade bustier top is a timeless piece that combines elegant structure with feminine styling. The Piper Strappy Bustier Top features shaped bust cups, a flattering fitted silhouette, a delicate frill neckline, adjustable knotted shoulder straps, a comfortable smocked back, and a classic hook-and-eye front closure for a beautifully tailored finish.
Whether you choose breathable cotton, lightweight crepe, flowing georgette, viscose, or the recommended polyester crepe, this intermediate sewing pattern is a rewarding project that helps you master techniques such as cup construction, shirring, gathering, and structured garment assembly. Follow the step-by-step instructions and you'll create a versatile top that's perfect for pairing with skirts, shorts, trousers, or layering under jackets and cardigans.
Ready to start sewing? Pick up the Piper Strappy Bustier Top Sewing Pattern and create a beautifully fitted handmade top with elegant details and a professional finish.
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Browse our Crop Top Sewing Pattern Collection for more stylish handmade tops perfect for warm-weather wardrobes.
Join the Community & Get Support
Share your finished Piper Strappy Bustier Top on social media with #MadeWithWinslets. If you have questions, feedback, or customization requests, contact the Winslet's team at support@winslets.com.
