How to Sister Size your Bra Pattern

How to Sister Size your Bra Pattern

Sister sizing is a really useful tool in bra-making. It’s the principle that some bra sizes share cup sizes, but have different band sizes, which basically means that you can create a new bra size, just by changing the length of your band. It’s a bit complicated to explain all in words so here is a bra chart:

This is the underwire sizing guide for full size range of the Black Beauty Bra. You can see that size 40B, 38C, 36D, 34DD, 32E, 30F & 28FF all use a size 40 underwire. They are all sister sizes- sizes that have the same cup, but different band lengths. That means that you can take any one of these sizes, and create one of its sister sizes by modifying the band length of the pattern.

I find that it’s easiest to think of sister sizes as sizes that all share an underwire size. So you can see from this chart that a size 34B, and a size 30 D are sister sizes, and a size 38DD and a 34F are sister sizes… etc

This also means that you can make sizes that are completely outside the range of the pattern, like shown in this chart:

You can see from this that if you had a size 40D pattern, you could make it into a size 42C pattern. Or if you had a 30G, you could modify it to be a 28GG. It really expands your size range.

It’s also really great if you fall between the two size ranges of my pattern. Say you measure to a 34DD, make up the pattern and realize that you want one cup size bigger – 34E, but that’s not available in your pattern! No worries, you can take the size 36DD, decrease the band size by one size and voila – 34E!

Then comes the question of how to make this alteration- how much do you remove or add from the back band for each bra size difference? Well I wanted to make that very simple for you, so I made a print out!

This print out is designed to work with my Black Beauty Bra pattern, and may not work for all bra patterns.

If you are decreasing your band size say from a 34DD to a 32E, you can print out the page here.

If you are increasing your band size, say from a 34DD to a 36D, you can print out the page here

Be sure to use 100% scaling when you print.

You can also watch my YouTube tutorial here

To Decrease Your Band Size

If you are decreasing your band size, you will take your back band piece, cut it in half (mark half by fold in your pattern piece in two) and mark a horizontal line to ensure your pattern pieces stay aligned. I call the two half ‘Center Back Band’ and ‘Outer Back Band’

Using the print-out, place your center back and along the indicated line, making sure that you line up your horizontal line too.

Then place your Outer Back band along one of the Band Size lines, overlapping your center back band, and keeping your pattern pieces aligned with the horizontal line. In this diagram I show decreasing by 2 band sizes (for example a 32 to a 28), but you should use whichever line works for your modification. Then you re-draw the top and bottom lines, keeping the side seam and hook and eye edge unchanged. Voila! Your new piece, and your new sister size!

To Increase Your Band Size

This alteration is very similar to the previous. You start by cutting your back band into two pieces and marking a horizontal line.

Then, using the print-out for increasing back band size, place your Center Back Band piece on the indicated line (aligning the horizontal lines) and place your Outer Back Band piece on the Band Line that suits the number of band size you wish to increase. In this example I show 2 sizes. Then you re-draw the top and bottom line of the pieces, keeping the side seam and hook and eye edge in-tact.

It’s really as simple as that!

I know that sister sizes really blew my mind when I first learned out them, and really opened up the possibilities of pattern sizing!

I’d love to know if you use my print-outs and if you find this tutorial helpful : )

xo

erin

Everything You Want to Know About Bra Tulle & Sheer Cup Lining | Vlog

Everything You Want to Know About Bra Tulle & Sheer Cup Lining | Vlog

Hi All!

 

I’m back at it again with the vlogs! And this time it’s all about two of my favourite sheer fabrics for bra making: Bra Tulle & Sheer Cup Lining (aka Marquisette Mesh).

 

As I’m sure you guys know by now- these are some of my most loved and most-used fabrics, and they are two fabrics that I get a lot of questions about- so I thought it was about time that I went over them in a video!

You Can Watch the Video Here 

 

And if you’re not much of a video person, than you can check out this post I did a while ago covering a lot of the same information 🙂

 

Of course, I offer both of these top quality lovely fabrics in my shop! I have Bra Tulle  (available in: white, warm white, blush, grey, midnight blue & black) and Sheer Cup Lining/Marquisette Mesh (available in: White, Latte & Black)

 

Do you like to use Bra Tulle or Sheer Cup Lining in your bras?

 

xo

 

erin

The Best Supplies for YOUR Swimsuit! | Vlog

The Best Supplies for YOUR Swimsuit! | Vlog

Hi All!!

This Sunday it’s all about swimwear- and all of the essential supplies for making a top quality suit- because I know when you’re first getting into making your own swimwear- it can be a little confusing to know what supplies you should get!

 

I made a video all about this over on my YouTube channel, if you want to see all the supplies in action 🙂

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Change Your Bra Pattern for Different Styles of Underwires

Change Your Bra Pattern for Different Styles of Underwires

Hi All,

This was also a highly requested tutorial- like last week’s tutorial on changing your pattern for different sizes of underwires. If you’ve read my posts on Underwire Fitting and my Guide to Different Underwire Styles. Then you might have found that you need an underwire that is a different style than the one that you use in your favourite pattern. So what do you do about it? – Modify the pattern of course.

 

To start off- I want to say, just like with any bra pattern modification, there are definitely limits to this- and depending on how large of a change you’re trying to make with you pattern, there will definitely be some test bras and fittings required. There’s only so much you can do with a bra pattern if you’re planning to make serious modifications.

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Modifying Your Bra Pattern for a Different Size Wire

Modifying Your Bra Pattern for a Different Size Wire

Hi All!

 

Today’s post has been HIGHLY requested after the past posts in underwire month, especially after my Underwire Fitting Post where I explained the ins and outs of wire sizing and how to find the right wire for you!

 

So now you’ve found the underwire that fits your size…. but maybe it doesn’t fit your bra pattern size- bummer.

 

Let me start off by saying that this is SO common- it’s almost the norm – it would be crazy to think that every person with the same cup volume would have the same wire size- so what do you do about it?

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