A good knit top should keep its shape. Giving the shoulders better stability can be achieved through a couple of simple steps.
A seam tape like ‘seams great’ can be sewn into the seam for a bit of movement but a bit of stability too. Any light weight tricot tape can be used. I’m just used to using ‘seams great’.
‘Seams great’ is easy to apply and comes in black or white. I keep a few rolls in my sewing stash.
The other process is to stitch along the seam once it’s been sewn. On the example below, I’ve sewn along the back shoulder seam catching the seam allowances and seam tape for a bit of stability.
These are the two steps I do to keep shoulder seams in knits stable.
velosews 
Wow, you are on a blogging streak. Thank-you for all the great tips.
I save selvedges in a box by the sewing machine. When I sew a knit top/dress, I search the box for something in a coordinating color as shoulder reinforcement.
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Hi Maria, Just wondering if you are able to buy Seams Great in Australia? I'm a knit newbie and am going to experiment with selvedge pieces, tape and so on.
Sarah (near Melbourne)
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Kushami.
I used to by 'Seams Great' from Punch with Judy online. There could be a local quilt shop in Melb that stocks it.
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