Maxi Calculator

Bikini Calculator

Find your perfect bikini size based on your measurements and body type

Bikini Calculator

Select your preferred measurement unit

Measure around the fullest part of your bust

Measure directly under your bust where your bra band sits

Measure around the narrowest part of your waist

Measure around the fullest part of your hips

Select the body type that best describes your figure

Table of Contents

How to Measure for a Bikini

Taking accurate measurements is essential for finding the perfect bikini fit. Here's how to measure yourself correctly:

  • Bust: Measure around the fullest part of your bust while wearing a non-padded bra. Keep the measuring tape parallel to the floor.
  • Underbust: Measure directly under your bust where your bra band sits. This measurement helps determine your band size.
  • Waist: Measure around the narrowest part of your natural waistline, typically above your belly button and below your rib cage.
  • Hips: Measure around the fullest part of your hips and buttocks, keeping the tape parallel to the floor.

For the most accurate results, stand straight with feet together and wear minimal clothing. Use a soft measuring tape and don't pull it too tight or leave it too loose.

Understanding Bikini Sizing

Bikini Top Sizing

Bikini tops are typically sized like bras, with a band size (number) and cup size (letter). The band size corresponds to your underbust measurement, while the cup size represents the difference between your bust and underbust measurements.

  • Less than 1" difference: AA cup
  • 1" difference: A cup
  • 2" difference: B cup
  • 3" difference: C cup
  • 4" difference: D cup
  • 5" difference: DD/E cup
  • 6" difference: F cup
  • 7"+ difference: G+ cup

Bikini Bottom Sizing

Bikini bottoms typically follow standard clothing sizes (XS, S, M, L, XL) or numerical sizes (0, 2, 4, etc.). Your waist and hip measurements determine your bottom size.

US size chart (approximate):

  • XS (0-2): Waist 23-24", Hips 33-34"
  • S (4-6): Waist 25-26", Hips 35-36"
  • M (8-10): Waist 27-29", Hips 37-39"
  • L (12-14): Waist 30-32", Hips 40-42"
  • XL (16-18): Waist 33-35", Hips 43-45"
  • XXL (20): Waist 36-39", Hips 46-49"

Bikini Styles for Different Body Types

Hourglass

With balanced bust and hips and a defined waist, hourglass figures look great in most bikini styles. Highlight your curves with:

  • Underwire tops for support
  • Mid-rise bottoms to showcase your waist
  • Belted bikinis to emphasize your waistline
  • Classic triangle tops and hipster bottoms

Pear

With hips wider than shoulders, pear shapes benefit from balancing proportions:

  • Tops with embellishments, ruffles, or bold patterns
  • Bandeau tops to broaden shoulders
  • Solid-colored bottoms in darker shades
  • High-waisted bottoms for coverage
  • Tie-side bottoms to adjust coverage

Apple

With a fuller midsection and often a larger bust, apple shapes look best in:

  • Tankinis or one-pieces with ruching
  • Underwire tops with good support
  • High-waisted bottoms with tummy control
  • V-neck styles to elongate the torso
  • Asymmetrical designs to create visual interest

Rectangle

With shoulders, waist, and hips of similar width, rectangle shapes can create curves with:

  • Tops with ruffles, padding, or push-up features
  • Bottoms with side ties or ruffles
  • Brazilian cut bottoms to create curves
  • Monokinis that create the illusion of curves
  • Color-blocked designs that create visual curves

Inverted Triangle

With shoulders wider than hips, inverted triangle shapes benefit from:

  • Halter tops to minimize shoulder width
  • Solid-colored tops in darker shades
  • Bottoms with ruffles, skirts, or embellishments
  • Full-coverage bottoms to add volume to the lower body
  • Asymmetrical tops to draw attention away from shoulder width

Bikini Shopping Tips

  • Try before you buy: Whenever possible, try on bikinis before purchasing. Sizes vary between brands, and seeing how a style looks on your body is invaluable.
  • Mix and match: Don't hesitate to buy tops and bottoms in different sizes if needed. Many brands now sell pieces separately to accommodate different body proportions.
  • Consider activity level: If you plan to swim, surf, or engage in beach sports, choose a more secure style that will stay in place during activity.
  • Check the coverage: Consider how much coverage you want in both the top and bottom. Options range from minimal (triangle tops, string bottoms) to full coverage (tankinis, boy shorts).
  • Quality matters: Invest in quality fabrics that retain their shape when wet and resist fading from chlorine, salt water, and sun exposure.
  • Adjustable features: Look for adjustable straps, ties, and clasps that allow you to customize the fit to your body.
  • Consider your comfort level: Choose a style that makes you feel confident and comfortable. The best bikini is one you feel great wearing.

Frequently Asked Questions

How do I know if my bikini top fits correctly?

A well-fitting bikini top should support your bust without digging into your shoulders or back. The band should be snug but comfortable, and the cups should fully contain your breasts without spillage or gaping. You should be able to raise your arms without the band riding up.

Should bikini bottoms be tight or loose?

Bikini bottoms should fit comfortably snug without digging into your skin or creating bulges. They should stay in place when you move but not feel restrictive. You should be able to fit a finger under the waistband and leg openings.

How do I choose the right bikini for my body type?

Choose styles that highlight your favorite features and provide support where needed. Hourglass figures look great in most styles. Pear shapes benefit from detailed tops and solid bottoms. Apple shapes should look for supportive tops and bottoms with coverage. Rectangle shapes can add curves with ruffles and padding. Inverted triangles balance proportions with minimal tops and fuller bottoms.

Why do bikini sizes vary between brands?

Bikini sizing varies between brands due to different sizing standards, target demographics, and design philosophies. European, US, and Asian brands often use different measurement systems. Always check the specific brand's size chart before purchasing, and consider ordering multiple sizes if shopping online.

Can I mix and match bikini top and bottom sizes?

Absolutely! Many women have different proportions between their top and bottom. Many brands now sell bikini pieces separately to accommodate this. Mixing sizes ensures a better fit and more comfort. You can also mix styles and colors for a personalized look.