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Is There Too Much Fabric At Your Underarm?

May 20, 2021 5 min read

Do you get extra fabric that likes to bunch at the underarm? Back when we first talked about this new series on adjusting patterns and how to get a great fit, excess fabric at the underarm was one of the issues we got a lot of comments on, so today we're going to look at reasons we get excess fabric and some things we can do to try to fix it.

Before we get into all the details though, I think it's important to say that this is a pretty subjective topic. What one maker may think is too much fabric under the arm, another may feel is the perfect fit. For example, I prefer quite a bit of ease under the arms as I hate feeling constricted in that area, so I often add extra length to my yokes. This can cause extra fabric at the underarm, which you can see in my FO photos below of Fern and Feather (link goes to Ravelry) and Puffy Chunky Sweater (also pictured are my Sarma mittens! (link goes to Ravelry))! See how I have extra folds and bulges of fabric? For some, this may be a fit issue, but for me it's perfect! So if you are reading this and start to worry that you are knitting your sweaters wrong or badly if you have this, remember it's only wrong if you don't like it. These posts aim to find the right fit for youand, more importantly, how to achieve it.

So if you are reading this and haven't been completely happy with the fit you've been getting at your underarm, let's take a look at some of the things that can cause issues.


Underarm ease

Underarm ease is the measurement between your actual underarm and where the underarm of your sweater lands and it is determined by the yoke or armhole depth. We need ease in the underarm to be able to move our arms freely. If there is not enough ease our sweater will be uncomfortable and constricting, but if there is too much it can lead to extra fabric that bunches up. While it's tempting to work to whatever ease feels good to you, it's worth considering what else is happening in your sweater first.

If you need a little help understanding ease and how to work it out based on your own measurements, check out this post, Understanding ease...

Consider the ease in the body:

If you have a lot of positive ease in the body of your sweater and you only have a small amount of ease at the underarm, it can lead to bunching under the arm. The extra fabric in an oversized sweater needs room to hang so if you are someone who usually prefers a fairly snug fit under the arm, it may be worth considering adding a little more ease than usual to accommodate the extra fabric.

Consider the ease in the upper arm:

In contrast, if your pattern has very little ease in the upper arm, be wary of adding too much ease at the underarm. This can cause the fabric at the underarm to get pulled towards the arm and bunch up.

If you are struggling to decide how much ease to add at the underarm, I find a good rule of thumb is to begin by keeping the underarm ease in proportion to the upper arm ease. It may not be the solution for every pattern, but it's often a good starting point.

Bust circumference is too large

This is tricky one! Too much fabric at the underarm can often be a sign that the bust size needs reducing. While this can work for knitters with a smaller bust size, it isn't that simple for anyone with a larger bust. This is because it's not so much that they are knitting the wrong size for their bust, but rather they are reaching the correct yoke measurement for their bust too soon. To understand this properly, we need to look at two things; the full bust measurement and upper bust measurement.

Upper v full bust measurement

Upper bust measurement -This is the circumference taken directly under your arms and across the upper part of your chest.

Full bust measurement - This is the circumference taken at the fullest part of your bust.

If you are also a sewer you will probably have heard of upper and full bust measurements, but they are rarely mentioned in knitting. This is because it's tricky to make adjustments between these two measurements when you are dealing with shaping and stitch patterns. However, understanding what they are, and more importantly, knowing your own, can help troubleshoot fit issues you are having.

If you wish to check out your own upper and full bust measurements, here is a great tutorial!

Now we know the difference between these two measurements, let's look at them in relation to knitting a sweater. No matter what type of sweater we are knitting, we almost always reach our full bust measurement at the underarm. So we have enough fabric to fit our full bust at our upper bust. Do you see the issue? Smaller busted knitters won't have too much of an issue here, but if you have a significant difference in measurements between the upper and full bust you will often have extra fabric at the underarm. This is a particular problem with Raglan sweaters.

So how do we fix it? The solution here is not a straightforward one as the ideal way forward is to choose a pattern size based on what will fit your shoulders and upper bust measurement and then doing a bust adjustment in the body to accommodate your full bust measurement. Bust adjustments are ways of adding length by inserting short rows to increase length at the front or working increases into the front only to give extra width. They can be quite complicated and need another whole post to themselves, one that is already in the works, so we're not going to try to tackle them here today, but if you are in the mood for a little further reading and would like to dive into the world of full bust adjustments, I recommend checking out this post to start. It's a super interesting read and gives lots of food for thought!

So is excess fabric under the arms a problem you have, and if so, how do you deal with it? As I mentioned at the beginning of this post, this isn't something you have to fix if you don't want to, but if you do struggle with this issue, hopefully knowing some of the causes can help you spot possible issues in a new project before you cast on, rather than just as it comes off the blocking mat! As always, we'd love to hear what you have to say on this subject for please feel free to share in the comments below!



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