Bikini Tops and Bottoms: How to Mix and Match Sizes for a Better Fit

Quick answer

Choose your bikini top and bottom sizes separately based on your bust and hip measurements, not your usual dress size. Order the size that matches each measurement, even if that means two different sizes. If you're between sizes, size up for comfort in the bottom and stay true to size for a supportive top.

Most bikinis are sold as a set, but your top and bottom may not need the same size. Mixing sizes gives you a better fit, more comfort, and a more flattering look. This guide walks you through a simple process to find your best top and bottom sizes, even if you're petite or have a small bust.

You'll learn how to measure, interpret size charts, and decide when to size up or down. We'll also cover common mistakes and how to avoid them. By the end, you'll know exactly how to mix and match bikini sizes for your body.

Why Mixing Bikini Sizes Works Better

Bikini tops and bottoms are designed for different body areas. Your bust and hip measurements often fall into different size ranges. For example, you might need a small top for a AA or A cup and a medium bottom for fuller hips. Buying a set in one size forces a compromise that can lead to gaping cups or digging waistbands.

Mixing sizes lets you get the right support and coverage where you need it. It's especially helpful for petites, who may need a smaller top but a curvier bottom, or vice versa. Many brands, including The Little Bra Company, offer separates so you can choose each piece individually.

• Check if the brand sells tops and bottoms separately. If not, you may need to buy two sets and swap.
• Focus on fit, not the number on the tag. A well-fitting bikini in two sizes looks better than a poorly fitting one in a single size.

Step 1: Take Your Measurements

Use a soft measuring tape to measure your bust and hips. Wear a non-padded bra or no bra for the bust measurement. Wrap the tape around the fullest part of your bust, keeping it parallel to the floor. For hips, measure around the fullest part of your hips and rear.

Write down both measurements in inches or centimeters. These numbers are your starting point. Don't rely on your dress size, as it varies by brand and style.

• Common mistake: Measuring over padded clothing or a padded bra. This adds inches and leads to a too-large top.
• Checkpoint: If your bust and hip measurements differ by more than one size category, you'll likely need to mix sizes.

Step 2: Compare to the Brand's Size Chart

Every brand has its own size chart. Look at the chart for the specific bikini style you're considering, as cuts and fabrics affect fit. Find the size that matches your bust measurement for the top and your hip measurement for the bottom.

If you fall between two sizes, consider the style. For a top with adjustable ties or hooks, you may be able to size down for a snugger fit. For a bottom with a fixed waistband, size up if you're between sizes to avoid digging.

• Common mistake: Assuming you're the same size in every brand. Always check the specific chart.
• Checkpoint: If the chart shows your bust in one size and hips in another, that's your mix-and-match combination.

Step 3: Choose Your Top Size

The top should fit snugly without gaping or spilling. For small busts, look for tops with removable padding or contoured cups to add shape. If you have a larger bust, choose tops with underwire or adjustable bands for support.

If you're between sizes, go with the smaller size if the fabric has stretch, or the larger size if you prefer more coverage. Remember that bikini tops often relax when wet, so a slightly snug fit initially is okay.

• Common mistake: Sizing up too much for a loose fit. A loose top can shift and expose more than you want.
• Checkpoint: Raise your arms and twist. The top should stay in place without riding up.

Step 4: Choose Your Bottom Size

The bottom should sit comfortably on your hips without cutting in or sagging. If you're between sizes, size up for comfort, especially if you have curvy hips or a fuller rear. For a more minimal coverage, you might size down, but ensure it doesn't dig.

Consider the rise: low-rise sits below the hip bone, while high-rise sits at or above the navel. Your hip measurement is key for the right fit. If the bottom has adjustable side ties, you have more flexibility.

• Common mistake: Choosing a bottom that's too small, causing muffin top or discomfort.
• Checkpoint: Sit down and move around. The bottom should not roll down or pinch.

Step 5: Test the Fit Together

Once you have your top and bottom sizes, try them on together. Check that the colors and styles coordinate if you're mixing different patterns. Ensure the top and bottom don't create gaps or overlap awkwardly.

Move around: stretch, bend, and simulate swimming. The bikini should stay put and feel comfortable. If something feels off, adjust one size up or down.

• Common mistake: Not testing movement. A bikini that fits while standing may not stay put when active.
• Checkpoint: If the top or bottom shifts excessively, try a different size or style.

Your Step-by-Step Mix and Match Bikini Sizing Plan

1. Measure yourself accurately: Use a soft tape to measure your bust and hips. Wear minimal clothing. Write down the numbers. Checkpoint: If your bust and hip measurements fall into different size categories, plan to mix sizes.
2. Consult the brand's size chart: Find the size that matches your bust for the top and your hips for the bottom. Don't assume you're the same size in all brands. Checkpoint: If you're between sizes, decide based on the style's adjustability and your preference for snug or relaxed fit.
3. Select your top size: Choose a top that fits snugly without gaping. For small busts, look for padding or contoured cups. For larger busts, prioritize support features. Checkpoint: Raise your arms and twist; the top should stay in place.
4. Select your bottom size: Choose a bottom that sits comfortably on your hips without digging. Size up if between sizes for comfort. Consider the rise and coverage you want. Checkpoint: Sit and move; the bottom should not roll or pinch.
5. Test the fit together: Try on both pieces and move around. Ensure they stay put and feel comfortable. Adjust sizes if needed. Checkpoint: If the top or bottom shifts excessively, try a different size or style.

Product Facts

• Lenna: Lenna [C008] is a seamless T-shirt bra designed specifically for petite figures, with smooth demi cups and contoured push-up padding. If you need a supportive bikini top for a small bust, the Lenna bra's design principles—smooth cups and push-up padding—can guide you toward bikini tops with similar features for a flattering fit.
• Elizabeth: Elizabeth [F006] is a lightly contoured, breathable sports bra that can also be worn as a maternity bra. For active beach days, a bikini top with light contouring and breathable fabric, like the Elizabeth bra, offers comfort and support without flattening.
• ashly-panty-81fbac3e59db6a2e290194ea-1320103">Ashly Panty: Pair the Ashly panty with the matching Ashly [A001] bra for a romantic, feminine set. Delicate eyelash lace and a full-coverage silhouette create a comfortable fit. When choosing bikini bottoms, consider full-coverage styles like the Ashly panty for comfort and a smooth look under cover-ups.
• Lucia Boyshorts: Complete the set with this classic lace boyshort, designed to pair perfectly with the Lucia deep-plunge push-up bra. The low-rise silhouette and sheer, flat lace create a feminine finish. Boyshort-style bikini bottoms offer more coverage and a low-rise fit, similar to the Lucia Boyshorts, which can be a great option if you prefer a modest bottom.

Mixing bikini sizes is a simple way to get a better fit. Measure yourself, check the brand's chart, and choose each piece based on your bust and hips. With these steps, you'll find a bikini that feels comfortable and looks great.