Title: How to Choose the Perfect Bra: A Complete Fit Guide | DAG Clothing

Why Most Women Are Wearing the Wrong Size

Choosing the right bra starts with one simple truth: most women have never been professionally measured, and body shape changes over time — through weight fluctuation, age, and even the type of clothing worn regularly. The good news is that finding your correct size is easier than most people expect, once you know what to measure.

Step 1: Measure Your Band Size

Using a soft measuring tape, wrap it firmly around your ribcage, directly under your bust, keeping the tape level all the way around. This measurement gives you your band size — the foundation of your bra's support.

Band Size

Under-Bust Measurement

28

27 – 28"

30

29 – 30"

32

31 – 32"

34

33 – 34"

36

35 – 36"

38

37 – 38"

40

39 – 40"


Step 2: Measure Your Full Bust

Next, measure around the fullest part of your bust, keeping the tape parallel to the ground and not too tight.

Step 3: Calculate Your Cup Size

Your cup size is determined by the difference between your full bust and band measurement:

  • 1 inch difference = A cup
  • 2 inch difference = B cup
  • 3 inch difference = C cup
  • 4 inch difference = D cup, and so on

For example, a 32-inch band with a 34-inch full bust gives you a 2-inch difference — a 32B.

Step 4: Know When to Size Up

If you find yourself between two sizes, it's generally better to size up rather than down, especially for band size — a slightly looser band under the bust is far more comfortable than one that digs in or rides up throughout the day.

Step 5: Choose the Right Style for Your Needs

Once you know your size, the next decision is style — and this depends entirely on what you need the bra to do:

  • Everyday comfort: A soft, breathable cotton bra like DAG's Cotton Classic Bra is ideal for daily wear, offering support without underwire pressure.
  • A more feminine, detailed look: Lace styles like the Cotton Full Lace Bra or Cotton Half Lace Bra combine support with a more delicate finish, ideal for wearing under fitted clothing.
  • Everyday minimalism: The Solace Bra and Lucid Bra offer clean, no-fuss designs suited to versatile daily wear under any outfit.

Step 6: Check the Fit in Motion, Not Just the Mirror

A bra that looks fine standing still can shift, dig, or gape once you move. Before committing to a size or style, raise your arms, twist slightly, and sit down to check that the band stays level and the straps don't slip.

Common Fit Mistakes to Avoid

  • Wearing the same size for years without remeasuring.
  • Choosing a smaller band size because it "feels" more secure — it's the straps and cup, not the band tightness, that should be doing the work.
  • Ignoring wear and tear — elastic loses its grip over time, so even the right size bra needs replacing periodically.

Find Your Fit With DAG

DAG's full bra collection — Solace, Lucid, Cotton Classic, Cotton Full Lace, and Cotton Half Lace — is available across the complete band and cup range from 28 to 40, so you can shop by your actual measurements rather than settling for "close enough."

Use DAG's Bra Size Guide to find your exact fit, then explore the full bra collection to choose your perfect style.

Back to blog

Leave a comment