Start with a garment that fits you well

The fastest way to make a pattern is to take apart a piece of clothing you already own and love. Pick something that fits your body the way you want the new garment to fit — if the shoulders are right, the sleeve length is right, and the overall shape works for you, you have already solved the hardest part of pattern-making.

Lay the garment flat on a large table or the floor. Smooth out wrinkles and pin it down at the corners so it does not shift while you work. You will be tracing around it, so it needs to stay still.

Trace the outline onto pattern paper

Use pattern paper — a large, thin paper made for this purpose — or regular kraft paper from a roll. You can also use newspaper in a pinch, though it tears more easily. Lay the paper under your garment piece by piece, pinning as you go.

With a pencil or pen, trace around the edges of each piece: the front, back, sleeves, collar, pockets, anything that is a separate part. Trace the seam line, not the raw edge, because that is where the actual sewing happens. Mark the grain line — the direction the fabric naturally wants to hang — by drawing an arrow along the length of each piece.

Write the name of each piece directly on the pattern paper: "Front Bodice," "Back Bodice," "Sleeve," and so on. Mark how many times you need to cut each piece — usually one or two of most pieces, sometimes four of a small piece like a pocket.

Key Takeaways

  • The easiest pattern comes from tracing a garment that already fits you, because you skip the guessing about measurements and fit.
  • Mark the grain line on every piece so the fabric hangs the way it should, and write how many times to cut each piece.
  • Add seam allowance — usually half an inch — to every edge before you cut your new fabric, because the pattern itself is the sewing line.
  • Test your pattern on cheap fabric first; a muslin test garment catches fit problems before you use expensive material.
  • You can also draft a pattern from body measurements using a ruler and basic geometry, though it takes more practice to get the fit right.

Add seam allowance to your traced pattern

The lines you just traced are the seam lines — where the needle actually goes. When you cut fabric, you need extra material beyond that line so you have something to sew. This extra space is called seam allowance.

Most home sewers use half an inch of seam allowance. Using a ruler, draw a new line half an inch away from every seam line you traced. This outer line is where you will cut the fabric. Mark which edges have seam allowance and which do not — a fold line or a binding edge might not need it.

Cut out your pattern pieces along the outer line. You now have a working pattern ready to use.

Test the pattern on cheap fabric before using good material

Make a test garment, called a muslin, from inexpensive cotton or linen. This costs five to ten dollars and takes an hour or two, and it will show you whether the fit is actually right or whether something needs adjusting.

Cut and sew the muslin exactly as you would the real garment. Put it on. If the shoulders are too wide, the armhole is too tight, or the length is wrong, you can see it when ready and mark the changes directly on the muslin.

Transfer those changes back to your paper pattern — move a line, add width, shorten a piece — and then cut your good fabric. This step saves you from ruining expensive material.

Draft a pattern from measurements if you do not have a garment to copy

If you want to make something you do not own, you can draft a pattern using your body measurements and a ruler. You will need a measuring tape, a large ruler or straightedge, and pattern paper.

Measure your bust, waist, hip, shoulder width, sleeve length, and bodice length. Write these down. Then, using a basic formula — usually found in sewing books or online tutorials — draw rectangles and lines on the pattern paper to create the basic shape of a front and back piece.

This method requires more practice because you are guessing at fit rather than copying something that already works. Most sewers who draft from scratch start with a commercial pattern and modify it rather than building one from zero.

Mark darts, pleats, and other shaping details

If your original garment has darts — the small triangular folds that shape fabric to your body — trace them onto the pattern. Mark the point, the wide end, and the stitching lines. Do the same for pleats, tucks, or any other shaping.

Mark notches on the seam allowance where pieces need to match up — a small cut in the paper at the point where the sleeve meets the armhole, for example. When you cut your fabric, you will cut small notches at these marks so you know exactly where to line things up when you sew.

Store and reuse your patterns

Once your pattern works, keep it. Store the pieces flat in a folder or envelope, or roll them loosely and tie them with string. Label the folder with the garment name, the size, and the date you made it.

You can use the same pattern over and over in different fabrics and colors. If you want to make it bigger or smaller, you can enlarge or reduce it on a photocopier — usually by 10 or 15 percent at a time — or redraw it at a new size.

Frequently Asked Questions

What if I do not have pattern paper?

Kraft paper, newspaper, or even large sheets of printer paper taped together work fine. Pattern paper is smoother and lasts longer, but any large, thin paper you can write on and cut will do the job.

Can I enlarge a pattern I found online?

Yes. Print it out and use a photocopier to enlarge it to the size you need, or trace it onto larger pattern paper and redraw the lines at a bigger scale using a ruler and the measurements from the original.

How much seam allowance should I use?

Half an inch is standard for most home sewing. Some sewers use a quarter inch for delicate work or a full inch for heavy fabrics, but half an inch is the safest choice if you are not sure.

What if the garment I am copying has a zipper or buttons?

Mark where the zipper or button placket goes on your pattern, but do not trace the zipper itself. Note the length and position so you know where to install it when you sew the new garment.

Do I need to add extra length for hems?

Yes. If your original garment already has a finished hem, measure how deep it is and add that length to the bottom of your pattern pieces. If you want a different hem depth, add that amount instead.