Front bodice
The front controls bust width, front length, neckline depth, front armhole, and waist shaping.
Pattern pieces explained
Bodice pattern pieces explained
A bodice block is the foundation for tops and dresses. Its pieces define the shoulder, neckline, armhole, bust, waist, and connection to sleeves or skirts.
A bodice block is the master pattern that most tops, dresses, blouses, and jackets descend from, and its two pieces carry more information than any other pair in pattern making. The front holds the bust shaping and the front neckline; the back holds the shoulder blade area and the back neckline; and the seams where they meet — shoulder and side — decide whether everything hung from them, from a collar to a sleeve to a skirt, sits level on the body.
The generator drafts front and back as a matched pair from the same measurements, so the edges that must agree are checked against each other: shoulder lengths match after dart intake, side seams are equal, and the combined armhole is drafted so a compatible sleeve cap can be set into it later. Each piece is printed with the solid stitch line, the dashed cutting line including your seam allowances, dart legs with their points, notches, and a grainline arrow.
This guide adds the working knowledge around those pieces: the order in which a bodice goes together, how to cut it, the dart and armhole mistakes that undermine every project built on the block, and where to pin at the first fitting. Because a block is usually sewn first as a test garment, the sequence below is also exactly the sequence for a fitting muslin — sewn with long stitches you can unpick in minutes.
Back bodice
The back controls back length, back neckline, shoulder position, back armhole, and waist shaping.
Shoulder seam
The shoulder seam joins front and back and places the armhole. It must match cleanly before adding a sleeve.
Neckline
The neckline defines the neck opening and the future finish: facing, binding, collar, or other edge treatment.
Armhole
The armhole is where a sleeve can be sewn. Its length and curve must be compatible with the sleeve cap.
Darts and waist shaping
Darts and waist shaping remove excess fabric and help the bodice follow the body.
How to use these pieces
Before sewing, check front/back balance, shoulder seams, neckline shape, armhole shape, waist shaping, dart placement, grainline, and sleeve compatibility.
Construction order
How the bodice pieces go together
The rule for any bodice: shaping before joining. Darts are sewn while each piece is flat, the pieces meet at the shoulders, then at the sides, and edge finishes come only after the fit is confirmed. Staystitch both necklines and both armholes immediately after cutting — they are bias curves and grow with handling.
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01
Mark and staystitch the curves
Transfer the dart legs, dart points, and notches to the fabric before moving the cut pieces, then staystitch the front and back necklines and armholes a few millimetres inside the seam line. This single habit protects every later step — a stretched neckline cannot be shrunk back.
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02
Sew the bust darts
Fold each front dart along its centre, match the printed legs, and sew from the wide end toward the point, letting the last stitches run off the fold. Tie the threads instead of backstitching. Press the bust darts flat first, then downward over a tailor's ham so the point rounds into the bust shape without a dimple.
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03
Sew the waist and back darts
Close the waist darts on front and back the same way, sewing to the point and tying off. Press vertical darts toward centre front and centre back respectively. After pressing, check that the darted waist edge still matches its notches — dart intake is exactly what the generator subtracted when it calculated the waistline.
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04
Join the shoulder seams
Place front and back right sides together and sew both shoulder seams on the stitch line, matching the neckline ends and the armhole ends precisely. If the back shoulder is drafted slightly longer, ease it onto the front between the notches — that small ease shapes over the shoulder blade. Press the seams open or toward the back.
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05
Close the side seams
Sew both side seams from the underarm down to the waist, matching the armhole ends and the waist edges. At this point the bodice is a complete shell and this is the moment to fit: pin the closures, put it on, and read the balance before any edge is finished.
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06
Finish the neckline
Once the fit is confirmed, finish the neckline with your chosen treatment — a facing, a binding, or a collar. Whatever the finish, it is applied to a staystitched, unstretched edge, clipped along the curve so it turns cleanly, and understitched or pressed so it rolls to the inside.
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07
Set the sleeves or finish the armholes
For a sleeved design, sew each sleeve seam, then set the sleeve into the closed armhole: match the cap notches, the underarm seam, and the shoulder point, and distribute the woven cap ease between the notches with two rows of ease stitching. For a sleeveless design, finish the armholes with facings or binding the same way as the neckline.
Bodice cutting plan
The block itself is only two main pieces; finishes such as facings are traced from their edges after the fit is settled. Keep every grainline arrow parallel to the selvedge — the centre front and centre back lines are the grain reference for the whole garment.
| Piece | Cut count | Fabric / interfacing | Joins to |
|---|---|---|---|
| Front bodice | Cut 1 on fold | Main fabric | Back at shoulder and side seams; sleeve at front armhole; neckline finish |
| Back bodice | Cut 1 on fold, or cut 2 with a centre-back closure | Main fabric | Front at shoulder and side seams; sleeve at back armhole; neckline finish |
| Neckline facing (optional) | Traced from front and back neck edges | Main fabric + fusible interfacing | Neckline, right sides together, then turned to the inside |
Cut on the dashed line; the solid line is where you sew. A fitting muslin needs a centre-back opening to get in and out — cut the back in two with an allowance at centre back even if the final design will be cut on the fold.
Common construction mistakes
Sewing darts from the point toward the edge
Starting at the point makes the first stitches land exactly where precision matters most, and backstitching there leaves a hard lump. Always sew from the wide end to the point, run off the fold, and tie the thread ends by hand.
Pressing bust darts upward
Bust darts are pressed downward and vertical darts toward the centre — that is the convention the seam allowances and any later lining are built around. A dart pressed the wrong way shows as a ridge on the outside and fights every seam that crosses it.
Skipping the staystitching
The neckline and armholes are the most bias-cut edges on the bodice. Handled without staystitching, they stretch a size larger before the facings go on, and the result is a neckline that gapes no matter how well the darts fit.
Ignoring the shoulder notches
The back shoulder often carries a few millimetres of ease (or a small dart) for the shoulder blade. Sewn edge-to-edge without matching the notches, that ease lands at the neck or the armhole instead, tilting the whole seam forward.
Setting a sleeve into an unchecked armhole
If the shoulder or side seams were adjusted at fitting, the armhole length has changed — but the sleeve cap has not. Walk the tape around the new armhole and compare it to the cap before setting the sleeve; the generator matched them for the original seams, and any alteration must keep that pair in balance.
Clipping the neckline before the facing is on
Clipping the raw curve early lets it stretch and fray exactly where the facing needs a stable edge. Sew the facing on first, then clip the joined seam allowances up to — never through — the stitch line.
Where to adjust the fit
Side seams for circumference
Bust, waist, and overall ease live in the side seams. Pin them deeper or let them out symmetrically at the first fitting, tapering to the armhole. Keep changes equal on both sides so the centre front stays on grain and on centre.
Darts for shape, not size
Dart depth and length control where the fabric hollows, not how big the bodice is. A gaping neckline or armhole is fixed by rotating that excess into the bust dart; a dart point that puckers is simply too long — end it 2–3 cm from the bust point.
Shoulder seam for balance
Diagonal folds from the neck toward the armhole mean the shoulder slope is off. Pin the correction along the shoulder seam — deeper at the armhole end for square shoulders, deeper at the neck end for sloped ones — and transfer the same change to the sleeve cap height if a sleeve will follow.
Armhole depth before the sleeve
Confirm the armhole while the bodice is still sleeveless: you should be able to move your arm forward without the bodice dragging. Raise or lower at the underarm only, then re-measure the armhole and check it against the sleeve cap before cutting sleeve fabric.
Frequently asked questions
What is a bodice block actually for — can I wear it?
A block is a fitting foundation, not a finished design: it maps your upper body with minimal ease so that styled patterns — blouses, dresses, jackets — can be developed from it. Most people sew it once as a muslin, perfect the fit, and then reuse the corrected block for every project that follows.
Why does the front piece have darts but the pattern still looks flat?
Paper is flat; the darts are the third dimension folded away. When the printed dart legs are sewn together, the flat panel curves over the bust and into the waist. That is also why dart position matters more than dart size — the point must aim at the fullest part of the bust, stopping 2–3 cm short of it.
Which line do I cut on, and are dart allowances included?
Cut on the dashed line — it already includes your chosen seam allowance around every edge. Darts are sewn on the printed legs inside the piece, so they need no extra allowance; just transfer the legs and points to the fabric before sewing.
Should I make a muslin even though the pattern was drafted from my own measurements?
Yes, for the bodice more than any other block. Measurements capture size, but posture, shoulder slope, and bust shape only show up on the body. A muslin from an old sheet, sewn with long stitches in an hour, is where those refinements happen — print at 100%, check the 5 × 5 cm test square, and treat the muslin as part of drafting.
How does the bodice connect to a sleeve or a skirt later?
Through its edges: the armhole is drafted to receive a sleeve cap with compatible length and ease, and the waist edge — measured after the darts are closed — is the join line for a skirt when the block grows into a dress. Keep any fitting changes recorded on the block so those edges stay true for the patterns you build from it.