So messen Sie sich für einen bügellosen BH, der wirklich passt

Quick answer

Measure your underbust snugly for band size and your fullest bust point for cup size, then use the difference to find your starting cup. Because wire free bras rely on band tension and stretch rather than a wire, always size to the snug underbust measurement and check that the band stays level when you move.

A wire free bra should feel like a soft second skin, not a compromise. The trick is getting two numbers right: your underbust and your fullest bust. Once you have those, you can choose a soft bra that supports without digging, rolling, or slipping.

This guide walks through measuring at home in about five minutes, then explains how to read those numbers for wire free, bamboo, and nursing styles. You will also find the fit checks that matter most when there is no underwire to hold everything in place.

Before you start: what you need

You do not need a professional fitting to get a good wire free bra size. A soft measuring tape, a mirror, and a few minutes are enough. Wear a non-padded bra or a thin top so the tape sits close to your body without compressing breast tissue. If you are measuring for a nursing bra, measure at your current size rather than pre-pregnancy size, because ribcage and cup size change through pregnancy and postpartum.

Stand in front of a mirror so you can keep the tape level. Keep your arms relaxed and breathe normally. Pulling the tape tight or holding your breath will give you a band size that feels too small, which is one of the most common reasons a wire free bra rides up or digs in.

• Use a soft, flexible tape measure, not a metal ruler or a phone app.
• Wear an unpadded bra or thin top, not a push-up or sports bra.
• Measure at the end of the day when your body is at its natural size.

Step 1: Measure your underbust for band size

Wrap the tape around your ribcage, directly under your bust where the band of a bra would sit. Keep the tape snug and level all the way around, and breathe out normally before you read the number. This is your underbust measurement. In most sizing systems, you add a few inches to get your band size, but the exact amount depends on the brand. For wire free bras, the band does most of the support work, so it should feel firm but not tight enough to leave marks.

If your underbust measurement is between two sizes, round down for a snugger band or up for a more relaxed feel. A band that is too loose will let the cups drift and the back ride up; a band that is too tight can cause irritation under the bust. Write down your underbust measurement in inches and centimetres so you can compare it to the brand's size chart.

• Common mistake: measuring over a padded bra, which adds inches to your band size.
• Checkpoint: the tape should sit level at the front and back, not sloping down.

Step 2: Measure your bust for cup size

Wrap the tape around the fullest part of your bust, usually across the nipple line. Keep the tape level and snug but not compressing. This is your bust measurement. To find your starting cup size, subtract your underbust measurement from your bust measurement. A one-inch difference is typically an A cup, two inches a B cup, three inches a C cup, and so on. This is a starting point, not a final verdict, because cup fit varies between brands and styles.

For wire free bras, cup size matters less than how the fabric stretches across your bust. A soft cup can accommodate slight size differences between breasts more easily than a moulded cup. If you are between cup sizes, choose the larger size for comfort and coverage, especially in bamboo or cotton-rich fabrics that have some give.

• Common mistake: pulling the tape tight across the bust, which understates your cup size.
• Checkpoint: the tape should touch your bust lightly, not flatten it.

Step 3: Check the band on the loosest hook

When your bra arrives, fasten it on the loosest hook. A new wire free bra should feel snug but comfortable on the loosest setting, because the band will relax slightly with wear. You should be able to slide two fingers under the band at the back without straining. If the band rides up when you raise your arms, it is too loose. If it leaves red marks or feels hard to breathe in, it is too tight.

This check is especially important for soft bras and bamboo styles, which rely on the band and the fabric's stretch to hold the cups in place. A band that fits correctly will keep the bra from shifting without needing constant adjustment.

• Common mistake: fastening on the tightest hook straight away, which shortens the bra's useful life.
• Checkpoint: the band should stay level all the way around, not hike up at the back.

Step 4: Assess cup coverage and the centre front

With the band fastened, check the cups. Your breast tissue should sit fully inside the cup with no bulging at the top or sides. The centre front of the bra, where the cups meet, should sit flat against your chest. If it floats away, the cups are too small or the band is too loose. If the fabric wrinkles, the cups may be too large or the style may not match your breast shape.

Wire free cups are often softer and more forgiving than underwired ones, but they still need to cover your tissue without gaping. Adjust the straps so they sit flat on your shoulders without digging in. Straps should not be doing the heavy lifting; if they are, go back and check the band.

• Common mistake: tightening the straps to fix a loose band, which causes shoulder pain.
• Checkpoint: no spillage, no gaping, and a flat centre front.

Step 5: Move, breathe, and re-check

Put the bra through a real-life test. Raise your arms, bend forward, twist your torso, and take a few deep breaths. The bra should stay in place without riding up or requiring adjustment. If you are trying a nursing bra, practise opening and closing the clip with one hand. The drop cup should release smoothly and the support sling should hold its shape.

A wire free bra that passes these movement checks is the right fit for everyday wear. If it fails, adjust the band size first, then the cup size, then the strap length. Small changes make a bigger difference than switching styles.

• Common mistake: judging fit while standing still in a fitting room.
• Checkpoint: the bra stays put through movement and deep breaths.

Your five-step wire free bra fit routine

1. Measure underbust snugly: Wrap a soft tape directly under your bust, keep it level, and breathe out before reading the number. This is your band starting point. Checkpoint: the tape should feel firm but not leave marks.
2. Measure the fullest bust point: Run the tape around the fullest part of your bust without compressing. Subtract the underbust number to find your starting cup size. Checkpoint: the tape should touch lightly, not flatten.
3. Fasten on the loosest hook: A new wire free bra should feel snug on the loosest setting. You should fit two fingers under the back band without strain. Checkpoint: the band stays level when you raise your arms.
4. Check cup coverage and centre front: Breast tissue should sit fully inside the cup with no bulging or gaping, and the centre front should lie flat against your chest. Checkpoint: if the centre floats, try a larger cup or smaller band.
5. Move and breathe: Raise your arms, bend forward, twist, and take deep breaths. The bra should stay in place without adjustment. For nursing bras, test the one hand drop cup. Checkpoint: if it rides up, adjust band size before changing cup size.

Wire free styles that put these measurements to work

• Bamboo Wire Free Maternity & Nursing Bra - Neutrals 3 Pack: This bra is designed with a nursing clip, one hand drop cup, and an interior support sling, plus a soft lining for sore nipples and lightly padded removable cups. If you are measuring for a nursing bra, these features mean you can size to your current underbust and bust without guessing whether the cup will adapt as your size changes.
• Bamboo Bikini: Made from a bamboo-rich blend with a side seam free and tag free finish, this bikini sits on the hips and is designed for all-day comfort. A smooth, seam-free base layer keeps your measurements accurate when you re-check fit, and it will not add bulk under a wire free bra.

A wire free bra that fits starts with two honest measurements and a quick movement test. Take five minutes with a soft tape, write down your numbers, and check the band on the loosest hook before deciding. When the band sits level and the cups cover without gaping, you can forget about adjusting and get on with your day.