Which seams should I take in?

Distribute the reduction across multiple seams for a balanced look. For waist: side seams and centre back. For bust: side seams and princess seams if present. Taking in too much at one seam distorts the garment.

How much can I safely take in at each seam?

Generally, take in no more than 2-3cm per seam side (4-6cm total per seam). Beyond this, the garment proportions may look wrong. If more reduction is needed, use more seams or consider resizing the entire garment.

How do I mark the new seam line?

Turn the garment inside out, pin the seam to the new position, and try on. The new seam line should taper gradually from the existing seam at the top and bottom to the deepest point at the waist or hip.

Should I unpick the original seam?

For a small adjustment, you can sew a new seam inside the original without unpicking. For larger adjustments, unpick the original seam first to reduce bulk. Always press seams after re-stitching.

SewCalcs

Taking In Calculator — Reduce Garment Size

Calculate how much to take in at seams for a smaller fit.

Current Measurement

Enter the current measurement

Desired Measurement

Enter the desired measurement

Number of Seams

Seams to distribute across

LocationEnter the location

How We Calculate This

The total reduction is divided equally across the selected number of seams. Each seam is taken in equally from both sides for a balanced result.

The formula

Total reduction = Current - Desired measurement

Per seam = Total reduction ÷ Number of seams

Per side of seam = Per seam ÷ 2

Frequently Asked Questions

Related Calculators

Hem Shortening Calculator

Calculate new hem position and fabric to remove when shortening.

Letting Out Calculator

Check seam allowances and calculate letting-out possibilities.

Tapering Calculator

Calculate tapering amounts for gradual seam adjustments.

Shoulder Adjustment Calculator

Calculate shoulder width and slope adjustments.

Crotch Depth Calculator

Calculate crotch depth adjustments for trousers.

Last updated: February 2026

All calculations are estimates. Always verify quantities before cutting or purchasing fabric.