How to Determine Your Bra Size for Swimwear

Quick Answer

To determine your bra size for swimwear, measure your underbust and bust, then calculate the difference. Use a swimwear size guide to match your measurements to the brand's sizing. For DD+ sizes, look for underwired or padded bikini tops that offer support.

Finding the right bra size for swimwear can be tricky, especially if you wear DD+ sizes. A well-fitted bikini top ensures comfort and confidence, whether you're lounging by the pool or swimming laps. This guide walks you through measuring yourself at home and matching your numbers to a swimwear size chart.

Unlike regular bras, swimwear sizing can vary between brands. Curvy Kate, for example, uses bra cup sizing for many of its bikini tops, so knowing your band and cup size is essential. Let's break down the process step by step.

Why Bra Size Matters for Swimwear

A bikini top that's too tight can cause discomfort and spillage, while one that's too loose offers little support. For larger busts, the right size is crucial for maintaining shape and preventing strain on your shoulders and back. Swimwear designed with bra construction, such as underwired cups or side support panels, provides the lift you need.

Many swimwear tops are now based on bra fit, not just S/M/L sizing. This means you can apply your measured bra size directly to find a bikini that fits like your favorite bra. For instance, Curvy Kate's Jet Set Padded Balcony Bikini Top is designed based on the Boost Me Up balcony bra, offering similar support and shape.

• Always measure yourself in your underwear, not over clothing.
• Use a soft tape measure and keep it parallel to the floor.

Step-by-Step Measuring Guide

Start by measuring your band size. Wrap the tape measure snugly around your ribcage, just under your bust. Make sure it's level and comfortable. Round to the nearest whole number. If the number is even, add 4 inches; if odd, add 5. This gives your band size (e.g., 32, 34, 36).

Next, measure your bust. Wrap the tape around the fullest part of your chest, keeping it straight across your back. Round to the nearest whole number. Subtract your band size from this bust measurement. The difference in inches corresponds to your cup size: 1 inch = A, 2 = B, 3 = C, 4 = D, 5 = DD, 6 = E, and so on.

• If you're between sizes, round up for comfort.
• Have someone help you measure for more accuracy.

Using a Swimwear Size Guide

Once you have your bra size, consult the brand's swimwear size guide. Some brands may use different sizing for tops and bottoms. For example, Curvy Kate's bikini tops are often available in bra sizes, so you can order your usual size. However, always check the specific product's size chart, as some styles may run larger or smaller.

If you're between cup sizes, consider the style of the top. Padded or balcony tops may offer more flexibility, while underwired styles require a precise fit. For DD+ sizes, look for tops with reinforced cups or side support to ensure you get adequate lift and coverage.

• Read customer reviews for insights on sizing.
• When in doubt, order two sizes and return the one that doesn't fit.

Your Swimwear Sizing Checklist

1. Measure your band: Wrap the tape under your bust, snug but not tight. Add 4 or 5 inches to get your band size. Checkpoint: The tape should be level and you should be able to breathe comfortably.
2. Measure your bust: Measure around the fullest part of your chest. Keep the tape straight across your back. Checkpoint: Ensure the tape isn't digging in or slipping down.
3. Calculate cup size: Subtract band size from bust measurement. Each inch equals one cup size (1=A, 2=B, etc.). Checkpoint: If you get a half-inch, round up to the next whole number.
4. Match to size chart: Use your bra size to select a bikini top. For DD+, look for underwired or padded styles. Checkpoint: Compare your measurements with the brand's specific size guide, as sizing can vary.

Curvy Kate Swimwear Sizing Insights

• Curvy Kate Jet Set Padded Balcony Bikini Top Black: Designed with foam lined, underwired cups for lift and shape, based on the Boost Me Up balcony bra. This top offers bra-like support, making it easier to find your size if you already know your bra size.
• Curvy Kate Jet Set High Waist Bikini Brief Black: Offers a flattering fit with full coverage and a modern high waist design. When choosing a bikini brief, consider your hip measurement and desired coverage; this style provides extra support and comfort.

Measuring for swimwear is straightforward once you know your bra size. Use this guide to find a bikini that offers the support and comfort you need, and don't hesitate to consult size charts or customer service for additional help. With the right fit, you'll feel confident and ready for any beach day.