Option 2 - contact us here and we'll help you work out your size
Option 3 - try our virtual fitting service here for a consultation with our expert
Option 4 - measure at home with these guides.
These charts are only a guide.
Please measure with a bra on. When measuring, you need to measure quite tight for your underbust measurement, and then over the bust, you measure loosely. Otherwise your result will be incorrect. Any questions, we're here to help.
Bra Size Chart
My Necessity Bra Size Guides
Use the following size guides to fit our My Necessity Bra which is available in both regular cup and full cup sizes.
Sister sizing allows you to find your perfect fit. Sometimes after measuring yourself it is possible that your size may still need to be adjusted.
The following chart shows sister sizing for each bra size. All of the sister cups in the same row are the same size.
Sister sizing is like a seesaw. If you move up in the band, move down in the cup and vice versa. For example if you find that a size 34E fits well in the cup, but is too big around the band, go down to the next sister size in the row and try a 32F.
HM Collectives Fitting Quiz will help you find the right size. Our fitting Video is another great way to make sure you have the correct fit. Still unsure? Please email your measurements and details of how many months pregnant/feeding, we will be happy to help, we can help you avoid couriering bras back and forth. Nb. We encourage getting the size right first as it's more sustainable to send a package out once, than multiple times.
Free shipping applies to all orders throughout the UK and Ireland on orders over the value of £40!
All discount codes are valid for full price items only. From time to time we have fabulous sales or promotions, the use of further discount codes are exempt. Your discount code will work again once the sale is over.
Please check your spam box first, if you still cannot find this please email us at support@hmcollective.com and we will give you all the information you need.
Allow 2-3 working days for UK deliveries and 5-7 days for all other areas. Peak holiday times and other occurances can affect delivery times. You can check the order status by logging into your Account
There are no duties on deliveries within the UK. Outside of the UK, customs duties and charges may vary, HM Collective is not responsible for any charges the recipient may incur.
All bras and sleepwear are returnable* for store credit, exchange or refund within 90 days to ensure you get the right fit. Please contact us for any fit questions to save you sending bras back and forth, we can definitely help with fit tips! It's also better for the environment to order once, so let us help. *Please see our dedicated Returns and Exchanges page for full details. FREE GIFTS must be returned or will be charged.
We offer free return shipping within the UK. Outside of UK return shipping is not refundable, however you will not be charged shipping for the exchange items to be sent to you.
We aim to process your exchange and store credits within 48hrs of receiving it at our collections warehouse. You will be contacted by email to let you know this has happened. Your store credit will be emailed or exchanged items will be sent out on the next available courier. Refunds will be processed once they have been forwarded back to us, allow 7-10 days. Peak holiday times may experience a slightly delay in processing times.
We have a generous 3 month policy for finding any faults, after this time frame it's considered fair wear and tear. Please email details and photos within 3 months to support@hmcollective.com
HM Collective gift vouchers and store credits normally expiry one year from date of purchase/issue.
If you have technical issues or find any errors on our website please contact support@hmcollective.com with details of the error and we can fix it.
My Necessity FULL CUP is designed for the fuller bust from an E cup to a G cup. If you are a smaller cup size, order our REGULAR version. S-XXL sizing is most similar to your clothing sizing. S = size 10, XXL = size 18.
My Necessity is a luxurious multi-fit seamless bra with removable foam cups and a side sling support. The perfect style for your hospital bag, for sleeping in and light exercise.
This Full Cup version has a hidden inside support panel designed to support the heavier bust. This is a soft support style with no seams for the ultimate in comfort, and a flexible fit that will expand 2-3 cup sizes to offer total comfort and flexibility for your changing size throughout your pregnancy and for postpartum changes.
FIT TIP: If larger then a G cup (GG/H) you may be able to sister size by going up in band size from your normal. ie M/34GG try a L Full Cup bra, this may work for you.
Our model is wearing a size XL Full Cup (she fits size 18 clothes and wears a 40E cup bra)
FEATURES - full cup coverage - side-sling skin-on-skin contact nursing support - wirefree cup support - easy dual cup fitting - removable contour cup - one-handed drop-down nursing clips for breastfeeding - 6 hook and eye fastenings for extending band size - inner panel for additional support for a Full Cup - rose colour - outer & lining 92% polyamide 8% elastane - S/32-34, M/34-36, L/36-38, XL/38-40, XXL/40-42 multi-fit E-G cup
All our garments are made with you in mind. Our fabrics and accessories are free from harmful chemicals and are all Oeko-Tex® Standard 100 Certified.
I wear a 30G. Although with breastfeeding my left boob is slightly bigger than my right♀️
So wired bras are quite annoying.
I could probably do with a larger cup in this.
The back is adequate on the tightest.
At first I couldn't do the clip up on my bigger boob!
Had to leave it open for a week or so.
It's all stretched a little now, so I wear it as normal.
Would appreciate slightly bigger cups.
Or another non wired small back big cup bra.....
Rebecca
Pre-pregnancy I am 30E, gone up 2-3 cup sizes since so initially ordered the small, was busting out of it so got the medium which I reckon I am now at the upper acceptable cup size for at 32FF/G. I can see myself getting a large or bigger(!) if my cup size increases again in pregnancy or for when my milk comes in. Or my band size increases loads.
It is very comfortable I sleep in it, never would have thought I’d sleep well in a bra but would fully recommend it.
Obviously it’s not going to be as supportive as a flexiwire but am pleasantly surprised by how good it is for a non-wired bra. Do get a monoboob effect going on as expected and impressive cleavage plus quite a lot of bounce if walking outdoors, but perfect as a lounge/home/sleep bra.
Only reason for knocking off a star is going up another back size to get more coverage would mean it rides up in the back and not as supportive. Would be amazing to have a ‘fuller cup’ option for the top end of cup sizes in each back size.
Christine L.
Fantastic bra, true to size.
Really comfortable and supportive, can use as night bra as well as day. I’m usually a UK size 10, 30DD/E but am currently 32G and 37 weeks. An S fits perfectly and provides a nice bit of cleavage too! Removable pads are great, I personally prefer them in the bra to hide the nips! Will be great for nursing too. Would highly recommend.
Helen H.
This bra is great for nursing, side sling means lots of skin to skin contact when feeding as nothing in the way. Very comfortable & I wore this whilst giving birth!
Christine L.
Lovely bra, very comfortable, supportive and true to size. Would highly recommend!
Christine I.
I have been putting off getting a wire free bra as I find the support for a fuller chest is really lacking. But after an uncomfortable few weeks with my last normal underwired bra, with baby number 3 due in 4 weeks I knew I couldn’t wait any longer.
I really wished I had bought this earlier, having been pregnant or breastfeeding for the past 4.5 years this is insanely comfortable, supportive and in such a pretty colour. Thank you so much- I think it is truly amazing. I also have it in frappe and am really considering a longer term option post baby as it is so so comfy.
Anyone worried about the lack of support shouldn’t be- I have been living in my two the past few weeks and have no concerns about popping out in public with one on instead of a traditional bra.
Amy K.
The strap broke on this bra - I contacted Hotmilk and immediately received a replacement - very happy with the second bra, no issues
Katy P.
Super comfy sleep bra. I take the padding out as don't need it. It's not the best fit but is the best I can get in my size and keeps my breast pads in place.
Sami G.
I finally found a maternity/nursing bra that fits!! Smaller band but fuller cup and with the padding too it adds shape. Super happy with it - thank you!!
Ella B.
This is the most comfortable bra ever! I’m a size 18 with bra size of 38GG pre pregnancy so went for the XXL and it fits like a dream. The fabric is so comfy, the waistband doesn’t dig in at all. Thank you so much Hot Milk! X
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