Sweetheart Swimsuit Navy & Plum - Monroe

Size Guide

This elegant new style combines a classic navy swimsuit with a sweetheart neckline with contrast plum panels to celebrate your waist and elongate your legs. Featuring built-in bust support and slim but supportive straps, why not tuck the straps in for strap-free tanning? 

Our Monroe shape fits C-E cup busts. For AA-B busts, shop The Hepburn. For F-HH busts, shop The Hendricks.


Dispatch w/c 8th July

Not sure about size?
  • Luxe under-bust elastic for lift and shape.
  • Low-cut under the arms for active use without chaffing.
  • Medium, flattering cut on the leg.
  • Full bottom coverage. No unwanted wedgies here.
  • Our Monroe model Berry usually wears a UK size 12 on top, a size 14 bottoms and a 32D bra. Shown here wearing a Deakin and Blue size 14 Monroe.
  • Super soft, high quality, sustainable Italian Lycra®. Lined, for double support. 
  • Made from recycled yarn ECONYL® from regenerated waste such as old fishing nets and industrial plastic scraps.
  • Soft, stretchy, light and breathable.
  • Durable and designed to last. Our chosen Lycra® is twice as resistant to chlorine, salt water and oils than standard Lycra. Full UV protection.
  • Designed and manufactured responsibly in London, UK.
  • Rinse after every use and hang to dry. Machine wash at 40° after every 2-3 uses. See full details on how to care for your swimwear. 
  • 78% Recycled Polyamide, 22% Elastane.
Customer Reviews
5.0 Based on 20 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
    RENE W.
    United Kingdom United Kingdom

    Too too fabulous!

    I previously had issues with a couple of styles and sizing but am absolutely THRILLED with the Sweetheart swimsuit! I hadn't worn it until the middle of December when I went to Cape Town for a holiday. I love, love love this suit!

    Grace M.
    United Kingdom United Kingdom

    Beautiful costume

    I only buy Deakin and blue costumes , and this one is certainly up to their usual high standards

    United Kingdom United Kingdom

    Fab swimsuit

    Love the sweetheart swimsuit navy & plum so much that I had to buy another one after I wore mine for four years at least twice a week. Nothing tips the quality and feel of this. Just the best.

    United Kingdom United Kingdom

    Lovely bathing suit

    Great fit, even after many uses. Lovely color. Will definitely buy again from your company.

    Karen P.
    United Kingdom United Kingdom

    Sweetheart Swimsuit

    This is the most comfortable costume I have ever had. The fit is very good. The style is wonderful and flattering. Has been worn in the sea several times now and is still looking good. I would definitely recommend deacon & blue to friends and family.

    Did you know?

    Our award-winning swimwear has been featured in The Guardian, The Times, The Telegraph, Women’s Health & more

    Here for a good time and a long time; our swimwear is thoughtfully designed to last season after season, swim after swim

    We have over 500 5* reviews for our products on our website, Google & Facebook - our customers love what we do!

    We offer free delivery and returns in the UK on all orders over £100: even more reason to treat yourself