Here is the line that rearranges the order of work: in the stored KTP Design Company SW-1 board short listing, board shorts typically do not come with a mesh liner. That is one supplier's model page and it governs nothing beyond that model — the Toplevel Custom Dye Sublimation Boardshorts page I keep beside it says nothing about liners at all — but it is enough to change the sequence. A liner that is not there by default is a line you write, quote and approve, not an accessory that appears at the end.
Which pushes the size chart into second place. Approve a size range first and settle the liner later, and the same measurements get approved twice, against two different garments.
Why Your Board Short Spec Starts With the Liner
The word doing the work in that SW-1 sentence is typical. It tells a sourcing team that a bare interior is the default state of the garment, and that anything with a liner attached is a requested build. Nothing on the page promises liner fabric, liner weight, gusset depth, or how a liner would be graded, and nothing else in front of me fills those gaps in.
The liner comes first because of where it hangs. It is anchored at the waistband and shaped around the gusset, the same region where the shell's rise and crotch seam are set. Change the liner and you change what the shell has to accommodate at the two points that decide whether a short is wearable: waist and leg opening. A shell graded across a full run with no liner is a finished spec. Add a liner and the size chart carries a second set of dimensions inside it, and those dimensions move with the shell or they fight it on the body.
Practically, that means four answers before the measurement table is approved: liner yes or no, which fabric, how deep at the gusset, how it is measured at each size. Answered first, the sample round tests one garment instead of two.
XS to XXL Is a Range, Not a Size Spec
The Toplevel Custom Dye Sublimation Boardshorts page lists sizes XS, S, M, L, XL and XXL, and describes that model's fit as ultralight, flexible and built for water or land. Both statements belong to that model on that page, and neither is a measurement. I checked that page for a graded table. What I found was a size list — labels a supplier is prepared to cut, with nothing on waist, outseam, inseam, leg opening, or where a liner gusset sits inside any of them.
That gap is where most liner arguments start. Suppose a buyer reads XS to XXL, assumes the interior is scaled the same way, and orders samples. The smallest size comes back with a liner leg opening almost as wide as the shell's, because the liner was patterned once at a mid size and copied across the run. Nobody lied on the page; the page never claimed a graded liner.
So ask for the table in points of measure with tolerances, size by size, and ask for liner dimensions to sit inside that same table rather than in a footnote: waist relaxed, waist stretched, outseam, inseam, leg opening, plus the liner's own leg opening and gusset depth. A supplier who returns only shell figures is treating the liner as trim, and trim is where size runs go wrong.
Checking the Liner Against the Size Chart
With samples on a table, the routine needs no instruments. I lay the smallest approved size and the largest approved size flat, side by side, and work from the outside in. I check the liner leg opening against the shell leg opening on each one, and compare the difference between the two sizes rather than the raw numbers. I look at where the gusset seam sits relative to the crotch seam, because that relationship is what keeps the liner in position when the shell moves.
Then I check the waist at the same marked point on both sizes, relaxed and stretched to a stated pull, so the two readings are comparable. What I am looking for is a relationship rather than a number: the liner edge sitting closer to the shell edge on one size than on the other. A liner that was graded holds that relationship across the run.
Once both samples are flat in front of you, the failure is not subtle. On the size where it goes wrong, the liner just didn't come along for the ride.
If the liner tracks the shell at one end of the run and drifts at the other, the liner was not graded and the size chart is incomplete. That is a spec failure, not a fit preference, and worth holding the approval for. None of this is a measurement I took on your garment; it is the routine an approval has to survive.
A Short Movement Check Before You Approve
Suppose the samples clear the table and you want one more read before signing. The check needs no lab: wear the approved size over the underlayer the end user would actually wear, then move — squats, a step-up onto a bench, and a reach across the body that mimics a paddle stroke.
Where it fails tells you what to change. Pulling at the gusset points to gusset depth running short against shell rise, and the correction belongs in the liner pattern. Ride-up at the leg opening points to an opening oversized for that size, so the opening is the correction rather than the fabric. Pulling at the front while the back sits quiet points at rise before it points at the liner.
This is a plan, not a result. I have not worn your samples, and no movement routine replaces a measurement taken against an approved table. Its value is that it turns a vague complaint into a named dimension: whichever movement fails goes back onto the approval sheet as one change — gusset depth, liner leg opening, or shell rise — with the size it failed on attached.
RFQ Lines That Make Liner and Size Quotable
The lines below are phrased as questions because that is what they are. Ask the candidate supplier, in writing, whether the short is quoted with or without a mesh liner, and if with, which liner fabric and what its weight and stretch are. Ask for gusset depth and liner leg opening measured at every size in the run, not only at the middle. Ask for the full graded table, with tolerances and unit, and which points are measured on a finished garment versus taken off the pattern.
Then narrow the sampling. Which sizes get made up — the smallest and largest at minimum, plus the mid size the liner was drafted at if it differs. Who signs the approved sample, and what that signature covers: shell measurements only, or shell plus liner. Put intended use on its own line, because a short aimed at swimming carries a different expectation of the liner than one cut for dry wear, and that expectation should be on the record before anyone builds a quote.
Price, minimums, capacity and lead times come back as the supplier's own answers. I hold no quote, no minimum and no production document for any candidate, so nothing here is a number to hold a factory to. What the RFQ fixes is the specification those later numbers attach to.
What Would Change This Recommendation
The liner-first sequence flips when the short is bought as a dual-purpose piece and the wearer supplies the base layer anyway. The Toplevel page positions that model as a water-and-land piece, and a short meant to work both ways often assumes a separate underlayer, in which case a sewn-in liner adds a component the end user never asked for.
It weakens when the buyer's size run sits entirely outside the sizes actually measured, because then the table is a document rather than a check, and when a candidate supplier already returns liner dimensions inside their own table, where the extra RFQ line costs a sentence and changes nothing.
There is a trade on the other side. A liner that never sees water is fabric, thread and drying time with no function, and on a warm-weather short that is a real cost. And if the intent is to copy the SW-1 build as listed, liner-free is not a gap to close; it is the specification.
Before anyone signs the sample card, get one thing in writing: liner gusset depth and liner leg opening at the smallest and the largest approved size. That pair is the cheapest evidence of whether the liner was graded with the shell or copied from the middle size, and it is the check that decides whether the rest of the table means anything.
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