Two orders of custom swim trunks can share the same artwork and still need to be built as different garments. A resort ordering a hundred pairs for poolside staff, a masters swim club kitting out for a relay carnival, and a groom buying eight matching pairs for a bachelor weekend are solving three different problems. The print file is the easy part. The decisions that determine whether people actually wear the trunks are inseam, fabric, liner, construction, and how you decorate them. This guide walks through those choices by use case so you can specify an order that fits the way it will be worn.
Match the inseam and cut to how the trunks get worn
Men’s swim shorts cluster around three inseam lengths. A 5-inch inseam sits high on the thigh and reads as retro or athletic. A 7-inch inseam lands at mid-thigh and is the safe default for a mixed group where you do not know everyone’s preference. A 9-inch inseam reaches toward the knee and suits taller wearers or anyone who wants more coverage. Knee-length board shorts are a separate cut entirely, running roughly an 18-to-20-inch outer seam. These figures are indicative mid-market standards rather than fixed rules, and a good tech pack will state the exact finished measurement per size.
Use case drives the choice more than fashion does. For a retail line you usually offer at least two lengths so customers self-select. For a uniform order, pick one length and size generously, because a staff pool includes body types a single cut has to flatter. For a novelty group order like groomsmen, a 7-inch inseam photographs well and avoids the complaints a 5-inch cut can draw from anyone not expecting it.
Fabric and liner: what each use case actually needs
The workhorse fabric for swim shorts is polyester or a polyester blend; published fabric roundups put polyester-based cloth in the large majority of performance shorts because it dries fast, resists chlorine and salt, and holds printed color. When you need real stretch, the common move is a 90 percent polyester, 10 percent spandex four-way-stretch blend, which moves with an active wearer at the cost of a little long-term durability. Nylon feels silky but dries more slowly and handles UV and chlorine less gracefully, which is why it shows up in fashion pieces more than in pool programs. Fabric weight for these shorts typically falls in an indicative 140-to-210 GSM band; lighter cloth packs and dries faster, heavier cloth feels more substantial and can hide a liner better.
The liner decision splits along the same use-case lines. A brief-style mesh liner is standard in swim trunks and is what most buyers expect for staff, teams, and gifting. True board shorts are often sold unlined because surfers wear them over a separate brief or rash guard. If your order is going to a resort or a fitness setting, keep the mesh liner; if it is a surf-styled retail product, consider offering it unlined and saying so clearly in the listing.
Decoration method by design and order size
How you put a design on swim shorts depends on what the design is. An all-over print that runs seam to seam is produced by dye sublimation on cut panels before the short is sewn, which is why photographic patterns and edge-to-edge color are possible on polyester swimwear at all. A small chest or hip logo on an otherwise solid short can instead be printed or heat-applied after construction. For a group of eight groomsmen shorts with a name and a date, a simple placed print keeps setup low. For a retail pattern or a resort’s branded repeat, sublimation is the method that carries it. Because sublimation bonds dye into polyester fibers rather than sitting on top, it does not crack or peel the way a surface print on the wrong fabric can, which matters for a garment that lives in pools and sunlight.
Order size, sampling, and lead time
Our minimum order is just 12 pairs per design, with any mix of youth and adult sizes inside one run — so a groomsmen group, a lifeguard crew and a full resort program all order from the same production line. Every order starts with a free mockup within 24 hours of sending your artwork, with unlimited revisions until you approve. Production runs about 2 weeks after approval (faster turnaround is available with express shipping), which is quick enough that even a mid-season reorder lands before the summer is over.
Plan the calendar backward from the date the trunks are needed: approve the mockup, add two weeks of production, then shipping. A team that wants trunks for a summer carnival should approve artwork about a month out to leave room for a revision round — and express turnaround covers the trips that got planned late.
A quick way to spec each common use case
For a resort or hospitality uniform, choose one 7-inch inseam, a polyester or light poly-spandex blend around 180 GSM, a mesh liner, and sublimation for a branded repeat pattern; order to the size curve of your actual staff and add a few extra pairs at the ends of the range. For a swim club or team, prioritize the four-way-stretch blend for range of motion, keep the liner, and lock the color to your team standard so reorders match. For groomsmen or event gifting, a short-run supplier, a 7-inch inseam, and a placed name-and-date print keep the order small and fast. For a retail line, offer two inseam lengths and at least a couple of colorways, decide liner versus unlined based on whether you are selling swim trunks or surf board shorts, and confirm fabric weight and UPF rating so your product copy is accurate. Specify the finished measurements, fabric content, liner, and decoration method on every order, and you remove the ambiguity that causes reorders to come back wrong.