Friday, 26 March 2021

How To Join Seams Neatly Using a Flat Seam

I know that many of you feel that your work is sometimes spoiled because your sewing up or joining is not as neat as it could be.

So, I thought I would show you how I do it.

There is often no right or wrong way in knitting – and perhaps you use a different method. That’s fine!

All I can say is, this is the way I was taught and it works for me.


Flat Seam                                 

If you knit my patterns regularly you will know that I slip the first stitch of each row knitwise, and knit the last stitch of every row.

There are only 2 exceptions to slipping the first stitch of a row –

1.     After a cast on row – the first stitch is knitted, not slipped

2.     When joining in a new colour – again, the first stitch is knitted, not slipped

By slipping the first stitch and knitting the last stitch, you will have a stable edge and a little ‘bump’ at the row edges. One ‘bump’ for every 2 rows worked.

When it comes to joining together two parts or sewing a seam, it is easy to join the ‘bumps’ and this keeps the seam neat and even.


How To make a flat seam ~

·        Place the two knitted pieces evenly on top of each other, with the right sides together

·        Use the tail from the cast on or cast off, and thread it on to a tapestry needle  – or if you are using a new length of yarn, leave a 3” tail for darning in later

·        Insert the needle from back to front through the first 2 ‘bumps’, and pull the yarn through

·        Insert the needle from back to front through the next 2 ‘bumps’, and pull it through (don’t pull too tightly or you will pucker the seam)

·        Continue in the same way until the entire seam has been joined

·        Cut the yarn, leaving a 3” tail - weave in this tail, plus the tail you left at the beginning of the seam


I hope these photos help ~ sometimes it is easier to see, than to picture in your head! 

I have used a contrasting colour of yarn to show you more clearly how it looks.

Garter Stitch


Stocking Stitch


Of course you don’t use a contrasting colour to join !

This is how my seam looks joined with the yarn I used to knit the pieces ~

I use this method for 95% of my makes. It looks good, and does not leave a bulky seam, which is important for baby garments in particular.

This type of flat seaming is also known as whipstitching.

If you are joining 2 pieces of different sizes (for example – for a frill), place safety pins at regular intervals along the seam and spread the extra evenly, to ease in the extra length equally along the join.


But, there are times when this method just does not work.

It is not suitable for stripes, Intarsia or Fair Isle patterns which use several different colours of yarn. For this type of work I really recommend that you use mattress stitch. It is a little tricky to master at first – but the results are well worth your efforts.  The are a few good tutorials for mattress stitch on YouTube.

Please let me know if you have found this ‘How To’ useful. 

 I am happy for you to use my patterns for your own use or for charity donations.  
In addition:  You can gift or sell any finished items you make from my patterns.    

However, please do not copy my patterns

Copyright © 2021 ‘made by marianna’       All Rights Reserved
This pattern (the information and photos) may not be copied or reproduced
or republished on any other webpage or website.


  1. Thank you so much for this,I'm rubbish at sewing up and get so frustrated, this will be of great help,thank you Marion x

  2. Thank you Marianna. I always find it difficult but this makes sense. I love this group and they have great ideas and imagination. xx

  3. Thank you for all the help

  4. Thanks helps a lot Marion xx

  5. Thank you. Bookmarking it so I can come back when I'm ready to sew up this pinafore.

  6. Thanks for sharing Marion. This is how I was taught too.

  7. Oh brilliant thank you. Love this group as well. 😁

  8. Thank you i will try it. I used to have difficulty sewing up but it is even worse now i have had a stroke and have limited use of my left side. It should help me to do a better job.

  9. Thank you Marion, that is a great help. Never happy with my seams. Thats great. x

  10. Hi I get the same end result as you but as I find threading needles difficult (however big the eye), I use a crochet hook and have the 2 sides open side by side and weave across back n forth in same markers as you use (into the end stitch) to the end before weaving in the ends with the crochet hook. So your way was reassuring thankyou and I hope my comment also helps others who find threading needles tricky.xx

  11. Thank you, that's a great help.

  12. Thank you for the nice, clear tutorial. The photos are especially helpful

  13. Thankyou so much I've never done a large blanket I'm nearly halfway there doing for kingsize bed , knitting in strips ( jordan pattern ) so not as much sewing but I'm going to try this method Thankyou for making things easier x