The Largest Stick on Bras - Stick on bra Size Guide

30th May 2015

5 years ago we just offered the stick on bras in A to D cup.  Due to customer demand we quickly produced the DD cup and these flew out.  We listened to our customers and then produced the E cup stick on bra, followed by the F cup, and then recently we produced the FF cup. 

The FF cup stick on bra is finally here and is available to purchase from us

I am certain the FF cup adhesive bra will become our best seller due to the growing demand for bigger sized bras. 


Average Bra Size:

It is reported that the average UK Bra size is a 36D.  We reported this from 2010.  Since then, there are other reports to say it is a 34DD.  A 36D and 34DD are sister sizes, sharing the same cup size volume, and if you were this size you would purchase our E cup stick on bra, see the chart below.  If you were a full/ large 34DD, or 36D we would recommend getting our F cup.


Stick on Bra Sizing Advice:

As the stick on bras do not have a back, please consider sister sizes when purchasing (see table below for details).  If you are a small 32 back size we would recommend selecting your normal cup size, however, if you are a full 32 cup size we would recommend going up a size (especially in the larger sizes due to vanity sizing).  Therefore, if you were a small 32F you would choose the F cup size.  If you are were full 32F or small 34F we would recommend that you choose the FF cup.

We offer the following stick on bra sizes; A cup, B cup, C cup, D cup, DD cup, E cup, F cup and now the FF cup.


What are Sister Sizes?

Bra cup size is relative to the band size. This means that when a bra's band size is increasing for a particular cup size, the cup volume is also increasing.  For example, a 36E cup has a bigger cup volume than a 34E and a 34E has a bigger cup size volume than a 32E and so on. 

Bra Sizing Marks and Spencers                                                       

And when a bra's band size is decreasing for a particular cup size, the cup volume is also decreasing.  Because of this, other bra cup sizes can have about the same volume, in relation to band size.  Bra sizes with about the same cup volume are labeled with different cup sizes - are called "bra sister sizes".  Confusing?!  What this means it that the cup size volume of a 32C is actually about the same cup size volume as a 34B and a 36A, see the chart below for more details.


Sister Bra Sizing Chart:

The below chart shows (in the 1st column) the sister sizes which are the same cup size volume.  As our stick on bras do not have a back you need to consider the sister sizes when buying your bra.  The 2nd column suggests which size of stick on bra you should purchase.  Please see our stick on bra options here,

Your Bra Size

UK Size Guide

BUY Stick on Bra Size

34AA, 32A, 30B, 28C

A Cup

36AA, 34A, 32B, 30C, 28D

B Cup

38AA, 36A, 34B, 32C, 30D, 28DD

C Cup

38A, 36B, 34C, 32D, 30DD, 28E

D Cup

38B, 36C, 34D, 32DD, 30E, 28F

DD Cup

38C, 36D, 34DD, 32E, 30F, 28FF

E Cup

38D, 36DD, 34E, 32F, 30FF

F Cup



38DD, 36E, 34F, 32FF, 30G

FF Cup





Customer Feedback:

As mentioned our bras are on the smaller side, and we always recommend going up a size if you are hovering between two sizes.  We never receive feedback saying that the smaller stick on bra sizes are too small i.e., A cup through to D cup (if the customer has followed the chart above).  However, we do occasionally receive feedback saying the larger cup sizes are too small, especially for the F cup.  We believe this is due to vanity sizing and customer choosing a size they prefer the sound of.  This may sound strange, but I believe I also do this!  I buy a 34B bra but I am actually only a 34A but I much prefer being a B cup and I can get away with the B cup and it is comfy!  Some woman with smaller busts will be more inclined to wear a size up because like me they feel better thinking they are a B cup than an A cup.  Some woman with larger busts may think they are smaller than they actually are.  Therefore, we believe that this explains why more women find our F cup too small.  Please keep this in mind, refer to our charts and if you are a really full 32F then buy the FF cup.

What do you mean by Vanity Sizing?

Vanity sizing means when a manufacturer changes the sizing scale of the pattern to make an original size bigger to make woman feel better about themselves that they can actually purchase a smaller size.  According to Vanity sizing, "also known as size inflation refers to the phenomenon of ready-to-wear clothing of the same nominal size becoming bigger in physical size over time."

Just to confirm we have not changed our bra size scale to fit with vanity sizing.  Therefore, our F cup stick on bra is really a match with M&S 34E cup bra in terms of cup size, as in the pic below.

Bra Sizing Guide


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