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 48hours for delivery. 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.
Ambition Triangle is pure wirefree comfort perfect for both pregnancy and breastfeeding with a designed to be seen mesh framing and sheer striped band elastic to soften the look of coverage yet supportive shaping with contour foam cups. The option of standard or racerback straps with rose gold hardware. 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.
*Magnetic nursing clips are not suitable to use for mothers with pacemakers or defibrillators
Our model is wearing a size 32D bra.
FIT TIP: This style fits a little small in the cup so if you're uncertain, go up a cup size to be safe.
FEATURES - plunge - a-frame discrete nursing support - wirefree cup support - contour cup - cotton lined cup - convertible racerback - rose Gold hardware - magnetic nursing clips twist to open - 6 hook and eye fastenings for extending band size - soft shell pink with shell pink mesh - cotton lined cup - match with Ambition Shell Brazillian Brief - outer 92% nylon 8% elastane - mesh 100% nylon - cup lining 100% cotton - size range 30-38 band, C-G cups
Nice looking bra but (as other reviews have said), the band rolls up. Not sure if it’ll be better once I’ve had the baby and have a bit more of a waist but at the moment it doesn’t even stay down when I put it on. Saying that, it’s not particularly uncomfortable. I think I saw they’ve relaunched the bra with an ‘improved band’ so hopefully the new version doesn’t roll up anymore.
Kathryn G.
Love the magnetic clips. Very comfortable fit
Verena B.
Great fit, lovely shape. I struggled with opening the magnetic clips initially, but they have loosened nicely, and now much easier to open.
Sam G.
It looks pretty and gives nice shape but isn't practical for me as my boobs fall out if I bend over. I'm constantly readjusting it to make sure I'm not spilling out, which gets a bit annoying and uncomfortable. I contacted customer services though and they were super helpful in recommending a style that might suit my escaping boobs better.
Jen P.
Fantastic service! The bra is amazing - looks beautiful & works seamlessly.
Aisling M.
I bought other maternity bras in this size 32FF and they fit well but this was too small (cup wise) but I had already taken off the tags to return. I also agree that the cup would likely get a crease from being turned over to feed given the nature of the material but it looked lovely, I wish it had fit.
Amy L.
Beautifully made, well fitting and MAGNETS , a game changer.
I didn’t know such fab nursing bras existed !
Abby M.
Beautiful bra. My body shape makes the beautiful band roll at the front. But I still love wearing it.
Stephanie L.
Super comfy and fits beautifully! Only slight downfall is padded cup gets a bit wrinkly from being folded down when feeding
Ruth A.
The band rolls up as I'm wearing it and gets quite uncomfortable by the end of the day. Otherwise it fits well.
Emily
I actually feel sexy with my massive pregnancy boobs and tummy?! This bra makes me feel like more than a human incubator. The plunge is really nice and the shear fabric is cute (and surprisingly sturdy!).
I can't deal with underwire during pregnancy - everything is sore and this baby is fighting me from the inside. This bra is comfortable.
I really like the smooth cups so no nipples or lace show on my shirt.
I'm not currently using it for breastfeeding but I'm worried that it will need 2 hands to open the clip, rather than the one-handed action I'm used to on my other hotmilk bras.
The band also rolls up on me - though there isn't much flat space between my boobs and my belly so that is understandable - but it isn't uncomfortable when it does roll up.
Alisa H.
Very comfortable bra! It's my favorite style...love the padded cup so it hides what it needs to...also I sized up 1 size in my cup like most reviews said and it fits perfect
Alisa H.
I love this bra! Very comfortable but not for sleeping....also I sized up 1 size on the cup and it fits well
Rachel P.
The sizing on this product is very small and the supplier is unhelpful.
Carrie W.
The bottom elastic tends to roll up when wearing so can get a little uncomfortable during the day.
Cassidy C.
Great bra very stylish and supportive. Feels nice on, not frumpy like normal maternity bras. My only negative is I've had to purchase a bra strap extender as it is very small around the back. I have a small midsection aswell so larger ladies would definitely struggle in this bra
Meiny L.
Love the black ones, bought the lighter collie to match lighter coloured outfits.
Emily
I agree with the review above, loved the look and cup coverage but the thick band rolls up and cuts in leaving a red sore mark. It is very tight so I would go a size bigger in the band. The band is also really scratchy where the clips are.
Louise Bartolac
This bra looks so so pretty on and gave me such support and a great shape. I love the rose gold clips that don’t even look like nursing bra clips! Great racer back function too. Unfortunately after wearing it all day the band cuts in and leaves a red mark (I was fitted properly it’s not too tight) . This is because the seam from the cups to the pretty band isn’t very smooth on the inside.
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