Step 1: Choose the design and the cloth
First decide what you want to make and who will wear it. Think of the use (school, party, sport), the season and your sewing skill. A simple shape with few seams is best for a beginner.
Then choose the fabric. Cotton is soft and easy to sew. Silky or stretchy cloth is slippery and harder. Before cutting, wash and iron the cloth, because many fabrics shrink the first time. Check the grain: the lengthwise threads run parallel to the edge (selvedge) and stretch the least.
Step 2: Pattern making and apparel sizes
A pattern is a paper copy of each piece of the garment. You make it from body measurements: chest, waist, hip, length and so on. Shops and factories use standard sizes (S, M, L or numbers), and a pattern company grades one pattern into many sizes.
Each pattern piece shows the grain line (an arrow), the name of the piece, and marks for darts and fold lines. Add the seam allowance (extra cloth outside the stitch line, often 1.5 cm) and the hem allowance before you cut.
Step 3: Cutting
Fold the fabric or lay it flat, and place the pieces so the grain-line arrows are parallel to the selvedge. Keep pieces close to save cloth. Pin the pattern down and cut with sharp shears in long smooth strokes. Transfer marks (darts, notches) with tailor's chalk. Never cut paper with your fabric shears: it makes them blunt.
Step 4: Basting and fitting
Basting means sewing long loose stitches by hand (or pinning) to hold pieces together for a while. Put the basted garment on the wearer or a dress form. Check the length, the width, the shoulders and the neckline. If something is tight or loose, you mark it and alter it. Basting stitches are easy to remove, so a mistake costs little.
Step 5: Sewing, finishing and wearing
Now sew the real seams by machine, usually with a stitch length of about 2.5 mm, along the stitch line. Sew back and forth at the start and end (backstitch) so the seam does not open. Finish raw edges so they do not fray: zigzag them, or use an overlocker. Press each seam with an iron as you go.
Last, make the hem, add buttons or a zip, and trim loose threads. Care for the garment by reading its care label, and wear it with the right size of underlayer and good posture so it hangs well.
Key formulas and definitions
- Order: Design → Pattern → Cut → Baste & fit → Sew → Finish → Wear
- One front or back piece width = chest ÷ 4 + ease share + 2 × seam allowance
- Cut size = finished size + seam allowance on every sewn edge
- Grain line arrow is parallel to the selvedge
Worked examples
1. Chest is 92 cm. A loose top has 8 cm ease in total and 1.5 cm seam allowance. Find the width of one front piece.
Quarter chest = 92 ÷ 4 = 23 cm. Ease share = 8 ÷ 4 = 2 cm. Seam allowance on both sides = 2 × 1.5 = 3 cm. Width = 23 + 2 + 3 = 28 cm.
2. A finished seam must be 40 cm long and the edges have 1.5 cm allowance. How long should the cloth edge be if the seam also needs 1 cm hem allowance at the bottom?
The 1.5 cm allowance runs sideways, so the length is only changed by the bottom hem: 40 + 1 = 41 cm (and a top edge allowance if there is a neckline seam).
3. You have 1.5 m of cloth, and a pattern piece needs 55 cm length. How many pieces fit in one row of length if they are placed one after another?
150 ÷ 55 = 2.7, so only 2 whole pieces fit. Rearranging side by side may save cloth.
Common mistakes
- Cutting before making or checking the pattern. A wrong cut cannot be fixed.
- Putting the pattern across the grain, so the garment twists or stretches.
- Forgetting the seam allowance, which makes the garment smaller than planned.
- Skipping the fitting and sewing strongly at once.