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Written by Julia Mulcair on May 8, 2024

Sewing the Perfect 6mm Seam with the PFAFF Magnetic Seam Guide

When sewing any garment the seam allowance is important. Most garments will have a 1 to 1.5cm seam allowance, which is easily identifiable on your machine’s base plate. When it comes to Lingerie making this gets a little trickier, most lingerie patterns have a 6mm seam allowance. Please see the video below.

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Why so small? the pieces are small and often have intricate curves and small seam lengths that a traditional seam allowance simply wouldn’t work with.

Adhering to an accurate seam allowance is even more important when you’re dealing with small pattern pieces with little room for error.

Let me take you through my top tips for achieving an accurate seam allowance. I’m using the small 6mm seam as my example here, but these methods could be applied to any seam allowance.

Cutting out is crucial

In order to achieve accurate seam allowance, you need to have accurate cutting. Everyone has their own preference here, whether it’s scissors or a rotary cutter, do what works best for you and what you’re most comfortable with. The small curves of lingerie pieces can often be better achieved with a rotary cutter.

Needle position

Did you know you can move the position of your needle from left to right? This is a great way to set up your machine for accurate seams every time. For 6mm seams I move my needle position all the way over to the right so my seam allowance underneath the right-hand edge of the presser foot.

This has to be my new favourite gadget! The PFAFF Magnetic Seam Guide magnet is super strong and holds well in place when the machine is running. Simply pop it in place before you start and you’ve got an easy to follow, perfectly accurate seam allowance for the duration of your project.


I hope you find these tips useful in achieving accurate seam allowance. Practicing accuracy in our sewing really does make it an easier, more enjoyable experience.

Until next time, happy sewing.

We can’t wait to see what you create! Don’t forget to share them with us on Instagram, tagging @pfaffsewingaus and using the hashtags #pfaffsewingaustralia #pfaffsewing #perfectionstartshere or our Facebook page Pfaff Australia

Article written by Julia Mulcair
Julia Mulcair is the owner of Pitt Trading, an Australian online fabric store and the lingerie society, a monthly subscription service for lingerie sewers. She grew up around fabric, and has been sewing for 30 years. Julia focuses on garment sewing, with a particular love of lingerie making. She shares her makes on Instagram and YouTube and is always working on the next lingerie design!

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