Designing Collars

Understanding the Foundation: The Neckline + Sloper

Before touching collars, everything starts with your basic bodice sloper — clean neckline (front and back), seam allowances removed, and shoulder seams aligned.

Key rule: Every collar begins with the true neckline measurement. Measure the back neckline, front neckline, and total neckline along the seamline — not the cut edge.

Why the Neckline Shape Determines Everything

• Neckline depth: deeper = collar sits further from throat, more open; higher = closer to chin, more structured
• Neckline width: wider necklines change the angle at which the collar sits and may require reshaping the inner curve
• Front vs. back curve: front is typically deeper than back; when joined at the shoulder, this combined curve is what the collar must follow precisely

Measuring the Neckline Correctly

Use a flexible tape measure stood on its edge, or walk a ruler along the curve in small increments. In Inkscape, use the measure tool along the path — not the bounding box width. Record three measurements separately: back neckline, front neckline (one side), and total neckline.

Tools You’ll Need

Interfacing: The Hidden Structure of Every Collar

Interfacing gives collars body, shape retention, and structure. Without it, most collars will wilt and lose their shape after the first wash.

Types of Interfacing

• Woven fusible: has grain, firm and stable — best for shirt collars, stand collars, structured points
• Non-woven fusible: no grain, cuts in any direction — good for simple flat collars and beginners
• Knit fusible: has stretch — best for knit garments or soft, drapey collar styles
• Sew-in: basted rather than fused — preferred for delicate fabrics or couture construction

Which Piece Gets Interfaced?

In a two-piece collar, the upper collar is typically interfaced. The collar stand in a shirt collar is also interfaced. Cut fusible interfacing to the seamline (no seam allowance) so it doesn’t create bulk in the seam.

Turn-of-Cloth

When a collar folds over itself, the outer layer travels a slightly longer distance. If both layers are cut identically, the upper collar will pull and the collar won’t lie flat. The fix: cut the upper collar ⅛–¼ inch larger all around the outer edge. In thicker fabrics, this difference needs to be larger. Always sew with the upper collar on top so the feed dogs ease the under collar in slightly.

Collar Points: Drafting, Sewing & Turning Cleanly

Drafting Sharp Points

Use a ruler to draw point lines precisely and check both sides are mirror images. In Inkscape, use the Align and Distribute panel to verify symmetry.

Sewing Collar Points

• Shorten stitch length to 1.5–2mm as you approach the point
• Sew one stitch across the point (not directly into it) — creates room to turn without distorting
• Trim seam allowance close to stitching at the point; grade seam allowances on either side to reduce bulk

Turning Collar Points

• Use a point turner (not scissors) to push the point out from inside
• Roll the seam slightly to the under collar side before pressing so the seam is invisible from outside
• Press firmly with a clapper or tailor’s ham to set the shape permanently

1. Flat Collar

Sits directly against the garment with no stand. Follows the neckline exactly. The most beginner-friendly collar style and the foundation for understanding how neckline curves translate into collar shapes.

Understanding the Inner Curve

The inner curve must match the neckline curve exactly. Too straight = collar gaps away from neckline. Too curved = collar pulls and puckers. Always draft directly from your neckline tracing — never from a straight line.

Outer Edge Design Options

• Rounded (Peter Pan): soft and youthful — use a French curve for a smooth arc
• Pointed: sharp and tailored — use a ruler for precise angles
• Scalloped: romantic and decorative — use a circle template for consistency
• Straight (square): modern and graphic — works best on square or boat necklines
• Asymmetric: one side differs from the other — label carefully (cut 1, not cut on fold)

2. Roll Collar

Sits between flat and structured — rolls gently over the neckline. You must add ease so the collar can roll. The transition point between a flat collar and a stand collar.

Why the Collar Needs to Roll

When a collar rolls, the outer edge travels a longer distance than the inner edge. By slashing and spreading the collar pattern, you add length to the outer edge, allowing it to roll smoothly without tension. A small spread (⅛” per slash) creates a gentle roll; a larger spread creates a more dramatic shawl-collar effect.

The Roll Line

The roll line is the fold line where the collar breaks and turns over. It is not always at the center of the collar — it depends on the collar stand height and garment design. Marking it on your pattern helps you understand where the collar will fold and whether the outer edge design will be visible.

3. Shirt Collar (Classic Collar + Stand)

A two-piece collar: a collar stand (base) and a collar fall (the visible part). The most technically demanding standard collar style — but once you understand its logic, every other collar becomes easier.

Understanding the Two-Piece System

The stand encircles the neck and attaches to the garment neckline. The fall folds over the stand and is visible from the front. The stand curves slightly upward at center back to follow the curve of the neck — a straight rectangle will gap at the back. This is one of the most common mistakes in shirt collar drafting.

Collar Point Styles

• Spread collar: wide angle between points — modern, works open or with a tie
• Point collar: narrow angle, long points — classic and formal
• Button-down: points fastened to shirt with small buttons — casual and preppy
• Club collar: rounded points — vintage-inspired and distinctive
• Cutaway: extreme spread, points nearly horizontal — very contemporary

4. Stand Collar (Mandarin / Band)

Sits upright with no fall. One of the most architectural collar styles — frames the face and neck without any softening fold.

Ergonomics of a Stand Collar

• Bottom edge (neckline seam) must match the garment neckline exactly
• Top edge should curve slightly inward (concave) to follow the narrowing of the neck toward the jaw
• Center back should be slightly taller than center front to account for the neck’s forward tilt
• Total height should not exceed 2 inches without a front opening — taller collars require a zipper or button to get the head through

Mandarin vs. Band

• Mandarin: 1–1.5 in tall, small gap at center front — Asian-inspired and contemporary minimalism
• Band: similar construction, often taller — used as a base for a detachable collar or standalone design detail

5. Shawl Collar

An extension of the garment — no separate piece at the neckline. It grows from the front bodice facing, and the roll line determines how the collar sits. Associated with tuxedos, robes, and wrap coats.

How the Shawl Collar Works

Unlike every other collar in this guide, the shawl collar is drafted as part of the front bodice facing. The collar and lapel are one continuous shape that rolls back from the roll line. The back neckline is finished with a separate back neck facing or collar piece that joins the shawl at the shoulder seam.

Roll Line Placement

The roll line runs from the top button diagonally up to the shoulder seam. A steeper angle = narrow lapel; a shallower angle = wide, dramatic lapel. Mark the roll line on your pattern and test by folding the muslin along this line before finalizing.

6. Flared Collar

Adds volume and drama using the slash-and-spread technique. The collar equivalent of a circle skirt — the outer edge is much longer than the inner edge, forcing the fabric to ripple and cascade.

Controlling the Amount of Flare

• Slight flare (¼” per slash): gentle ripple — elegant and subtle
• Moderate flare (½”–1” per slash): visible cascading folds — romantic and feminine
• Full circle flare: dramatic and theatrical — calculate inner radius: r = neckline measurement ÷ (2 × π)

Best Fabrics for Flared Collars

Chiffon, georgette, silk, rayon challis, cotton voile. Stiff fabrics will not drape — they will stick out horizontally. For a more structured ruffle, use cotton lawn or light poplin.

7. Bias Collar

Cut on a 45° angle to the grainline — allows natural stretch and softness. Drapes beautifully, conforms to curves, and is ideal for soft, flowing designs. Less about structure, more about movement.

Why Bias Changes Everything

Woven fabric stretches significantly on the bias (45° diagonal). A bias-cut collar conforms to the curves of the neckline and body without pulling or puckering, and moves with the wearer rather than sitting rigidly.

Tips for Sewing Bias Collars

• Cut carefully and handle as little as possible before sewing
• Stay-stitch the inner curve immediately after cutting (just inside seam allowance)
• Use lightweight fusible interfacing if you need stability without losing drape
• Let the collar hang on a dress form for 30 minutes before attaching — bias fabric will drop and stretch slightly, and you want this to happen before it’s sewn in

Fitting Collars: Common Problems

• Gaps at back neckline: inner curve too straight — re-draft with a more curved inner edge
• Collar stands away at front: too flat for neckline depth — add more spread or deepen inner curve
• Uneven collar points: pattern not symmetrical — always draft one side and mirror it; never draft both sides freehand
• Puckers at neckline seam: collar and neckline measurements don’t match — walk the seams and adjust before cutting
• Stand collar digs into throat: top edge too straight — add a slight concave curve to follow the narrowing of the neck
• Shirt collar stand gaps at back: stand drafted as a straight rectangle — add a slight upward curve at center back

Fabric Selection for Collars

• Shirt / stand collar: cotton poplin, broadcloth, linen — crisp and stable with interfacing
• Flat collar (Peter Pan): cotton lawn, voile, silk — lightweight, lies flat without bulk
• Roll collar: medium-weight wovens, wool crepe, ponte — enough body to roll cleanly
• Shawl collar: wool, velvet, brocade — heavier fabrics that drape with weight and hold the roll line
• Flared collar: chiffon, georgette, silk, rayon challis — lightweight fabrics that cascade and ripple
• Bias collar: silk, rayon, cotton voile — fabrics that drape well on the bias

Hand Drafting vs. Inkscape

Hand More intuitive for beginners, easier for feeling proportions, faster for one-off designs.

Inkscape Precise and repeatable, easy to edit and scale, ideal for production patterns. Measure exact curved path lengths to verify collar inner curve matches neckline before cutting — much faster than tape-measure work by hand.

Professional Tips That Change Everything

1. Always walk your seams. Collar and neckline lengths must match exactly. Even ¼ inch difference causes puckering.
2. True your curves. Sharp transitions cause puckering. Use a French curve to smooth every curve after manipulation.
3. Add turn-of-cloth allowance. Especially for thicker fabrics — the outer collar must be slightly larger than the under collar.
4. Test in muslin. Even perfect drafts behave differently in fabric. Always make a test collar before cutting fashion fabric.
5. Think in 3D, draft in 2D. Visualize the finished collar on a neck before finalizing your draft.
6. Stay-stitch immediately. As soon as you cut a collar piece, stay-stitch the inner curve just inside the seam allowance.
7. Press at every stage. Use a tailor’s ham for curved seams and a clapper to set sharp edges and points.

Final Thought

Once you understand that every collar starts as a manipulation of the neckline — and that shape, spread, and angle control how it sits — you stop copying designs and start creating them. The collar is one of the most visible details on any garment. Getting it right, from the draft to the pressing, is what elevates a garment from well-made to beautifully made.