Best Men's Swim Trunks for Every Body Type
The best swim trunk for your body type is one where the inseam length sits above the knee and the fit is snug without restricting movement. For most men, a 5-inch inseam in a size matched to your waist measurement is the right starting point. The sections below break it down by build.
Athletic and muscular builds
Athletic men with larger thighs need swim trunks with genuine four-way stretch fabric. Rigid waistbands and non-stretch outer fabric will pinch and restrict. Look for swim trunks with an elasticated back waistband and stretch fabric throughout.
A 5-inch or 7-inch inseam works well for muscular builds. The 5-inch sits cleanly mid-thigh showing the quad without being overly short. A compression liner (not mesh) is particularly important for athletic builds because it moves with the muscle rather than bunching or chafing during active movement.
Tucann's Aqua Liner compression liner is made from stretch swim fabric and specifically designed to move with an athletic body. Size up if your thighs are significantly larger than your waist measurement.
Tall men (over 6 feet)
Taller men suit a 7-inch inseam for the most proportional look. A 5-inch inseam also works well for men up to 6 foot 3 or 4. Avoid 3-inch inseams if you have particularly long legs as the proportion can look unbalanced. The key rule for taller men is that the hem must sit above the knee. Any length reaching the knee reads short on a tall frame.
Shorter men (under 5 foot 9)
Shorter men suit a 3-inch or 5-inch inseam. The shorter length elongates the leg visually. Avoid mid-thigh or below-knee lengths which cut the leg and reduce perceived height. A clean, modern cut above the knee is consistently more flattering on shorter frames than longer boardshort styles. The 5-inch is the safer choice if you are unsure about the 3-inch.
Slim or lean builds
Slim men have the most flexibility with inseam choice. All three lengths (3, 5, and 7 inches) can work well. The main thing to avoid is swim trunks that are too large in the waist. Excess fabric bunching at the waist reduces the clean silhouette that suits a lean frame. Size to your waist measurement, not your regular clothing size.
Larger builds and dad bods
For larger or fuller builds, a 5-inch or 7-inch inseam provides the most flattering coverage. A well-fitted swim trunk at 5 or 7 inches looks intentional and modern. The key is fit: avoid going too large in the waist to compensate, as excess fabric creates bulk. A drawstring waist with elastic back (like Tucann's construction) accommodates a range of waist sizes comfortably without adding visual bulk.
Compression liners are particularly beneficial for larger builds as they provide structure and prevent the inner thigh friction that mesh liners cause.
How to size Tucann swim trunks
Tucann swim trunks size by waist measurement. The size guide is:
- S: 30 inch waist
- M: 32 inch waist
- L: 34 inch waist
- XL: 36 inch waist
- XXL: 38 inch waist
If your waist is between sizes, size up. The elastic back waistband accommodates a range of measurements within each size.
Which inseam length should you choose?
- 3 inch: Best for shorter men, confident wearers, European resort style. Shows the most leg.
- 5 inch: Best for most men. Most popular globally. Sits mid-thigh. Versatile for all settings.
- 7 inch: Best for taller men or those who want more coverage. Sits at the upper thigh, above the knee.
What makes Tucann swim trunks work for all body types
Tucann swim trunks use four-way stretch fabric throughout, including the Aqua Liner compression liner. This means the fabric moves with the body rather than restricting it, regardless of build. The elasticated back waistband and flat-lay drawstring front accommodate a range of waist shapes without creating bulk. And the modern shorter lengths (3, 5, and 7 inches, all above the knee) are flattering on more body types than longer boardshort styles.
