This site has limited support for your browser. We recommend switching to Edge, Chrome, Safari, or Firefox.

Cart 0

Congratulations! Your order qualifies for free shipping You are $0 away from free shipping.
No more products available for purchase

Subtotal Free
Shipping, taxes, and discount codes are calculated at checkout

Size Guide: Understanding Mens Swimwear Measurements

Size Guide: Understanding Mens Swimwear Measurements - Bondi Joe Swimwear

Choosing the right size swim trunks can significantly enhance your comfort and confidence at the beach or pool. Understanding men's swim trunk sizing is essential to ensure a perfect fit, whether you're lounging by the pool or taking a dip in the ocean. In this comprehensive guide, we'll delve into the intricacies of swimwear measurements, helping you make informed decisions for your next swim trunk purchase. By the end of this article, you'll be equipped with the knowledge to select the ideal swim trunks that suit your body and style preferences.

The Importance of Proper Sizing

Why Fit Matters in Men's Swim Trunks

Proper fit in swim trunks is crucial not only for comfort but also for functionality. Ill-fitting swim trunks can lead to discomfort, restricted movement, and even embarrassing wardrobe malfunctions. By understanding the importance of accurate sizing, you can avoid these issues and enjoy your time in the water.

Common Issues with Incorrect Sizing

Incorrect sizing can result in a variety of problems:

  • Too Tight: Restrictive and uncomfortable, causing chafing and limited movement.
  • Too Loose: Risk of falling off during activity, lack of support, and unflattering appearance.
  • Inconsistent Fit: Different brands have varying size charts, making it essential to understand how to measure correctly.

How to Measure for Men's Swim Trunks

Measuring Your Waist

The most crucial measurement for swim trunks is your waist size. Here's how to measure it accurately:

  1. Use a Flexible Tape Measure: Wrap it around your waist, where you naturally wear your pants.
  2. Ensure a Snug Fit: The tape should be snug but not tight, sitting comfortably against your skin.
  3. Note the Measurement: Record the number where the tape meets.

Measuring Your Hips

Some swim trunks, especially those with a tailored fit, may require hip measurements:

  1. Stand with Feet Together: Measure the fullest part of your hips, ensuring the tape is level.
  2. Record the Measurement: Note the number for accurate sizing.

Inseam and Length

Depending on your preference for swim trunk length, measuring the inseam can be helpful:

  1. Inseam: Measure from the crotch to the bottom of the leg.
  2. Overall Length: Measure from the waistband to the hem of the swim trunks.

Understanding Size Charts

Decoding Size Labels

Brands often use different sizing labels, such as Small (S), Medium (M), Large (L), and numerical sizes (30, 32, etc.). Understanding these labels is essential:

  • Alpha Sizes (S, M, L): Usually correspond to a range of waist measurements.
  • Numerical Sizes: Directly correspond to your waist measurement in inches.

Brand-Specific Variations

Each brand may have its own size chart, so it's vital to check the specific measurements for the brand you're interested in. Refer to their official size chart for the most accurate fit.

Choosing the Right Fit

Types of Swim Trunks

There are various styles of swim trunks, each with different fits:

  • Board Shorts: Longer length, typically reaching the knees, suitable for active water sports.
  • Briefs: Minimal coverage, providing maximum freedom of movement.
  • Trunks: Mid-length, offering a balance between coverage and mobility.
  • Jammers: Tight-fitting, extending to the knee, often used by competitive swimmers.

Fit Preferences and Body Types

Your body type and personal preferences play a significant role in choosing the right fit:

  • Athletic Build: Opt for snug-fitting trunks that highlight your physique.
  • Slim Build: Mid-length trunks add volume and create a balanced look.
  • Stocky Build: Avoid overly tight trunks; instead, choose a relaxed fit.

Tips for Finding the Perfect Swim Trunks

Material Matters

The fabric of swim trunks can affect their fit and comfort:

  • Polyester: Durable and quick-drying, but may lack stretch.
  • Nylon: Lightweight with some stretch, providing comfort and flexibility.
  • Spandex: Offers excellent stretch, ideal for active swimming.

Trying Before Buying

Whenever possible, try on swim trunks before purchasing:

  • Check for Comfort: Ensure they fit well around the waist and hips without being too tight or too loose.
  • Move Around: Test the trunks by walking, bending, and stretching to ensure they stay in place.

Adjustable Features

Look for trunks with adjustable features:

  • Drawstrings: Allow you to customize the fit around the waist.
  • Elastic Waistbands: Provide flexibility and comfort.

Caring for Your Swim Trunks

Washing and Drying

Proper care can extend the life of your swim trunks:

  • Rinse After Use: Rinse with fresh water to remove chlorine or salt.
  • Hand Wash: Use mild detergent and hand wash to preserve the fabric.
  • Air Dry: Avoid using a dryer; instead, air dry to prevent damage.

Storing Your Swimwear

Store your swim trunks properly to maintain their shape and quality:

  • Fold Carefully: Avoid crumpling to prevent creases and damage.
  • Keep in a Cool, Dry Place: Store in a well-ventilated area away from direct sunlight.


Understanding men's swim trunk sizing is crucial for finding the perfect fit that combines comfort, functionality, and style. By measuring accurately, decoding size charts, and considering your body type and preferences, you can select swim trunks that enhance your swimming experience. Remember to care for your swimwear properly to maintain its quality and longevity. With the right knowledge and attention to detail, you'll be ready to make a splash in swim trunks that fit just right. Read more in our full set of guides to mens swimwear comfort and fit.


How do I know my swim trunk size?
Measure your waist and refer to the specific brand's size chart to find the best fit.

What should I do if I'm between sizes?
If you're between sizes, consider the fit you prefer. For a looser fit, size up; for a snug fit, size down.

Are all brands' sizes the same?
No, sizes can vary between brands. Always check the brand's specific size chart.

What length of swim trunks should I choose?
The length depends on your preference and body type. Board shorts are longer, while trunks offer a mid-length option.

Can I wear regular shorts as swim trunks?
Regular shorts are not designed for water activities and may not dry quickly or provide the necessary support.

How can I ensure my swim trunks last longer?
Rinse after use, hand wash with mild detergent, air dry, and store properly to extend their lifespan.


How Long Should Men's Trunks Be?

How Long Should Men's Trunks Be?

Choosing the right length for men's swim trunks can significantly impact comfort, style, and functionality. Whether you're heading to the beach, lounging by the pool, or engaging in water sports,...

Read more
10 Trends in Men's Swim Trunks - Bondi Joe Swimwear

10 Trends in Men's Swim Trunks

Men's swim trunks have evolved significantly over the years, with new trends emerging each season. Whether you're hitting the beach or lounging by the pool, staying up-to-date with the latest...

Read more