What's the Best Inseam Length for Swim Trunks? A Complete Guide

The best inseam length for swim trunks depends on your height, body type, and how you plan to use them, but for most guys, a 5-inch inseam hits the sweet spot between modern proportions and practical coverage. If you're shorter or prefer a bolder look, a 4-inch works great. If you're taller or want something more versatile for casual wear, a 6-inch or 7-inch inseam is the better call. This guide breaks down every length so you can make the right decision without guessing.

WHAT IS INSEAM LENGTH IN SWIM TRUNKS? 📏

The inseam is the measurement from the crotch seam to the bottom hem of the leg opening. It's the single most impactful measurement when it comes to how swim trunks look and feel on your body, more so than the waist size, which is usually easy to adjust with a drawstring.

A shorter inseam means more leg exposed, a lighter feel, and a more modern silhouette. A longer inseam means more coverage, a more traditional look, and often better performance for active water sports.

EVERY INSEAM LENGTH: WHAT TO EXPECT ➡️

⚡THE 4-INCH INSEAM

The 4-inch inseam sits high on the thigh and is the boldest choice in the lineup. It's had a major comeback in the last few years, driven by the return of retro and European-influenced swimwear.

Who it's best for: ✅

• Guys under 5'8", shorter inseams are more proportional on a shorter frame

• Anyone who wants a modern, fashion-forward look

• Active beach days where you want maximum leg freedom

• Guys with confidence in a bold silhouette

Who might want to skip it: ⚠️

• Very muscular thighs, the shorter hem can feel tight at the leg opening

• Guys who prefer a more conservative look or plan to wear trunks as casual shorts

At Bermies, the Short and Short Liner have a 4-inch inseam. The Short Liner adds a built-in compression liner for full support without underwear.

🎮THE 5-INCH INSEAM: THE SWEET SPOT

The 5-inch inseam is the most universally flattering length for most body types. It hits just above mid-thigh, short enough to look modern, long enough to be proportional on almost any frame.

Who it's best for: ✅

• Most guys (5'6" to 6'1" especially)

• Anyone who wants a versatile length that works in the water, on the beach, and as casual wear

• Guys who want the shorter, more modern trend without going full 4-inch

The Classic and Classic Liner at Bermies are built around this 5-inch inseam. It's the best-selling length in the collection for a reason.

🌊THE 6-INCH INSEAM

The 6-inch inseam hits at mid-thigh and is the most versatile length for guys who want something between the shorter modern styles and the traditional longer fit.

Who it's best for: ✅

• Athletic builds with larger thighs — the extra length prevents the hem from pulling or looking too tight

• Guys who want to wear trunks as casual shorts and prefer a slightly longer cut

• Anyone who splits time between the water and casual wear

The Tailored at Bermies is a 6-inch cut with a clean, slightly slimmer silhouette, designed to read as much as casual shorts as swimwear.

🏖️THE 7-INCH INSEAM

The 7-inch inseam falls just above the knee and is the traditional, classic swim trunk length that most guys grew up wearing. It's been somewhat replaced by shorter styles in fashion-forward circles, but it's still very relevant and works well for certain body types.

Who it's best for: ✅

• Taller guys (6'2" and above) — longer inseams look more proportional on a longer frame

• Guys who prefer more thigh coverage

• Anyone who wants a more conservative, traditional look

The Long and Long Liner at Bermies have a 7-inch inseam.

🏄♂️THE 8-INCH INSEAM: BOARDSHORT TERRITORY

The 8-inch inseam is essentially a boardshort-length trunk. It hits at or just below the knee and is the most coverage you'll find in swim trunk construction.

Who it's best for: ✅

• Guys who surf or do active water sports (more coverage = less wax rash, less drag)

• Very tall guys (6'3"+)

• Anyone who wants a hybrid between a traditional boardshort and a modern lined trunk

The Boardshort Liner at Bermies gives you this longer length with a built-in compression liner, something traditional boardshorts almost never have.

HOW TO CHOOSE BASED ON YOUR HEIGHT ➡️

Frequently Asked Questions 💡

What inseam length is best for swim trunks?

For most guys, a 5-inch inseam is the best all-around choice, it hits just above mid-thigh, looks modern without being too bold, and works in and out of the water. Shorter guys often prefer 4 inches; taller guys often prefer 6 or 7 inches.

Are shorter swim trunks in style?

Yes. The trend over the last several years has moved toward shorter inseams (4–5 inches), replacing the longer boardshort-length styles that dominated the 2000s and 2010s. The 5-inch inseam is now the mainstream standard, with 4-inch gaining popularity.

What inseam is best for tall guys?

Tall guys (6'2" and above) generally look best in a 6-inch, 7-inch, or 8-inch inseam. Shorter inseams can look visually small and out of proportion on a long frame.

What inseam is best for short guys?

Shorter guys (under 5'7") typically look best in 4-inch or 5-inch inseams. Shorter lengths expose more of the leg and create a taller, more proportional silhouette. Avoid inseams that hit at or below the knee, they cut the leg and make you look shorter.

Does inseam affect how swim trunks fit at the waist?

No, inseam and waist sizing are independent. The waist is adjusted via the elastic waistband and drawstring. The inseam only affects the length of the leg opening.