How to Choose the Right EBY Bra Size Without a Fitting Room

Quick answer

Measure your underbust snugly and your bust loosely, then compare the difference to EBY's size chart before buying. If you're between sizes, size up for wireless styles like the Relief Bra and Support Bralette, and size down for sheer bralettes that stretch. When in doubt, choose a bundle so you can test two sizes at home and keep the better fit.

Shopping for a bra online without a fitting room feels risky, but it doesn't have to be. The trick is knowing your measurements, understanding how each EBY style is built, and using simple decision rules instead of guessing. This guide walks you through measuring at home, reading fit signals, and matching your body to the right EBY bra or bundle.

You don't need a professional fitting to get a comfortable bra. You need a soft tape measure, five minutes, and a clear plan for what to do if the first size isn't perfect. EBY's wireless and seamless designs make that plan easier because they flex with you rather than forcing your body into a fixed shape.

Measure yourself in three steps

Start with a soft tape measure and a mirror. Wear an unlined bra or no bra at all. Wrap the tape snugly around your ribcage directly under your bust, keeping it level all the way around. Write that number down. This is your underbust measurement. Next, wrap the tape around the fullest part of your bust, usually across the nipple line, without compressing the tissue. Keep the tape parallel to the floor. Write that number down too. The difference between these two numbers helps you find your starting size on EBY's chart.

If you get a half-inch or fraction, round to the nearest whole inch. Measure twice to catch any slip. For wireless bras like the Relief Bra, the underbust measurement matters most because the band does the supporting work. For sheer bralettes, the bust measurement matters more because the fabric stretches. Write both numbers somewhere you can find them when you shop, and re-measure every six months or after any significant weight change.

• Keep the tape level and snug, not tight enough to leave marks.
• Measure over your natural bust shape, not a padded bra.
• If one side is larger, measure the fuller side and fit to that.

Match your measurements to EBY styles

EBY's Relief Bra uses SoftWire 3D Wing Suspension, which means it supports without a traditional underwire. That construction gives you more flexibility in sizing than a rigid underwire bra. If your underbust measurement falls between two band sizes, choose the larger band for the Relief Bra. The wing suspension works best when the band sits flat against your ribcage, and a too-small band will ride up or dig in. The cups are seamless, so they conform to your shape rather than cutting into it.

The Support Bralette and Sheer Bralette are softer, stretchier styles. The Support Bralette has removable pads and adjustable straps, and larger cup sizes get wider straps for extra support and coverage. If you're between sizes in a bralette, size down for a closer fit or size up for a relaxed feel. Sheer bralettes stretch more, so they're forgiving if you're off by half a size. The Nude Bra 3 Pack includes the Relief Bra, Sheer Bralette, and Support Bralette, which lets you compare three fits in one order.

• Relief Bra: size up if between band sizes for a flat, comfortable band.
• Support Bralette: size down for more lift, up for lounging.
• Sheer Bralette: most forgiving; choose your usual size first.

Know when a bra fits and when to exchange

A well-fitting wireless bra should feel snug but not tight. The band should stay level in the back, not ride up. The cups should lie smooth against your skin without gaping or spilling. Straps should stay put without leaving deep grooves. If you can slide two fingers under the band comfortably, the band size is right. If the band lifts when you raise your arms, it's too loose. If you feel pressure points or the band leaves red marks that last more than an hour, it's too tight.

For the Relief Bra, check that the SoftWire wings sit flat against your sides and don't curl. For the Support Bralette, make sure the removable pads stay in place and the wider straps (on larger cup sizes) distribute weight without digging. If a sheer bralette feels too loose, try a smaller size before exchanging the style. If a bra passes these checks but still feels off, the issue may be the style rather than the size, so consider a different EBY design.

• Band stays level all day: correct size.
• Cups gape or wrinkle: try a smaller cup or different style.
• Straps dig in: loosen them or size up in the band.

Use bundles to test sizes without extra risk

Bundles are the smartest way to shop online when you're unsure of your size. The Nude Bra 3 Pack gives you the Relief Bra, Sheer Bralette, and Support Bralette in one order, so you can compare three fits and keep the one that works best. The Black and Arabesque Light Lift Sheer Bra Duo includes two Light Lift Sheer Bras in different colors, which is useful if you already know your size and want variety. The Murex Shell and Black Sheer Bralette Bundle pairs two eco-friendly mesh bralettes designed to fit all body types.

If you're completely new to EBY, start with a bundle that includes at least one wireless bra and one bralette. That combination covers most fit preferences. If you already know you prefer wireless support, go straight to the Relief Bra. If you want a soft, everyday layer, the Sheer Bralette or Support Bralette is a better starting point. Bundles also reduce the cost per bra, so testing sizes is less expensive than buying singles.

• New to EBY: start with the Nude Bra 3 Pack.
• Know your size: try a two-color duo for variety.
• Prefer bralettes: choose a sheer bralette bundle.

Decision rules for choosing your EBY size

• If your underbust measurement is between two band sizes: Choose the larger band for wireless styles like the Relief Bra. The band should sit flat and level; a smaller band will ride up or dig in. Checkpoint: you should be able to slide two fingers under the band comfortably.
• If you're between sizes in a bralette: Size down for a closer, more supportive fit. Size up for a relaxed, lounging feel. Sheer bralettes stretch, so they're more forgiving either way. Checkpoint: removable pads should stay in place and straps shouldn't dig in.
• If you're unsure of your size entirely: Start with a bundle like the Nude Bra 3 Pack or a sheer bralette bundle. You'll get multiple fits to compare at home and can keep the best one. Checkpoint: compare the band level, cup smoothness, and strap comfort across all pieces before deciding.
• If a bra passes the fit checks but still feels uncomfortable: The issue is likely the style, not the size. Try a different EBY design: switch from a wireless bra to a bralette, or vice versa, depending on where you feel pressure. Checkpoint: discomfort in one style doesn't mean your size is wrong.

Product facts that affect fit

• Black Relief Bra: Features SoftWire 3D Wing Suspension for support without underwire, with seamless construction and available in bra sizes. The flexible wing design tolerates half-size differences better than a rigid underwire, so if you're between band sizes, choose the larger one for a flat, comfortable fit.
• Nude Bra 3 Pack: Includes the Relief Bra, Sheer Bralette, and Support Bralette. The Support Bralette has removable pads, adjustable straps, and wider straps on larger cup sizes for extra support and coverage. This bundle lets you test three different EBY fits in one order, which is the fastest way to find your size without a fitting room.
• Murex Shell and Black Sheer Bralette Bundle: Made with eco-friendly materials and designed to fit all body types. If you prefer a stretchy, forgiving fit, this bundle's mesh bralettes adapt to your shape, making them a low-risk choice when you're unsure of your exact size.

Who this size guide is for

Best for

• Online shoppers who want to buy EBY bras without visiting a fitting room
• Anyone between sizes who needs a clear rule for sizing up or down
• First-time EBY buyers who want to test multiple fits with a bundle

Not for

• Shoppers who need a professional fitting for medical or post-surgery reasons
• Anyone looking for underwire or push-up styles, which EBY's wireless designs don't include

Choosing the right EBY bra size without a fitting room comes down to two measurements and a few clear rules. Measure your underbust and bust, size up for wireless bands when between sizes, size down for bralettes when you want more support, and use bundles to test fits at home. With those steps, you can shop online with confidence and skip the fitting room entirely.