How to Lengthen a Pattern (& Shorten) – Easy Method

Are you wondering how to get the perfect fit for your sewing patterns when the person you are sewing for is not a standard size? Well, see below for instructions on basic fitting and how to lengthen a pattern or shorten a pattern. The basic steps for lengthening a pattern is to slash the pattern as the correct point and then spread it apart, and add paper underneath for the new length.

How to Alter a Sewing Pattern

The images and sizing chart below are from an A-line dress pattern but you could easily use this method to alter sizing for most dress patterns. There is no right or wrong length for a dress. It will not only depend on your actual height but your personal preference.

Show off your best assets and have confidence no matter what you do. Being able to sew and alter patterns means you will always have your best foot forward with an individual style that flatters.

How to Lengthen a Pattern, Step by Step Instructions

Step 1 – Take Measurements

Refer to the pattern’s size chart with chest, waist, and hip measurements and cut out the paper pattern piece of the size that most closely corresponds. If you are looking for girls dress patterns, Treasurie has a wide collection.

It is much easier to alter a pattern’s length than to alter the width. This rule holds whether you are sewing a dress or a leotard.

Step 2 – Comparisons

If possible, grab a favorite dress from the cupboard that is the perfect length.

Everyone has a different idea of perfect! You might want it shorter to wear with leggings, or you might want it longer to cover your knees. Compare the length of the dress to the pattern piece.

You will want the pattern piece to be around 1 to 1.5 inches (2.5-4 cm) longer than the actual dress. This takes into account the seam allowance at the shoulder and the hem. Work out how much you want to lengthen the pattern.

Step 3 – Slash the Pattern

Cut across your front and back pattern piece about halfway down and below the waist.

Step 4 – Pattern Lengthening Alterations

How to Lengthen a Pattern – Put a piece of paper underneath, spreading the pattern by the amount necessary. Sticky tape it together. Blend the edges.

How to Shorten a Sewing Pattern

Start by performing steps 1 to 3 above. Once the pattern has been slashed at the correct place, overlap the pieces removing the amount required. Sticky tape it in place and blend the edges.

Conclusion

And that is how to lengthen a pattern or shorten it. Perfect fit!

More Sewing Articles

• Sewing 101
• Sewing Stretch Fabric
• Stretch Factor (Includes a printable chart).
• Sewing Stretch Hems