Blank Tee Construction 101: Tubular vs. Side-Seamed Knit (And Why It Changes Your Print Results)
Most buyer's guides for blank tees stop at fabric weight and fiber content. But two blanks can share the same GSM, the same cotton, and the same price — and still print, fit, and wear differently because of how the knit tube itself was built. That difference comes down to construction: whether the body of the shirt is tubular or side-seamed, and how the collar and shoulders are finished. If you're sourcing for a print shop, a merch program, or your own clothing brand, this is the detail that explains why a "cheap" blank sometimes prints worse than a slightly pricier one.
What "Construction" Actually Means
Knit t-shirts start as a continuous tube of fabric produced on a circular knitting machine. From there, a manufacturer makes one of two choices for the body of the shirt:
Tubular Knit
The knit tube is cut to length and used as-is, front and back from the same continuous loop of fabric, with no side seams. It's the fastest, lowest-cost way to build a tee, and it's how most entry-level blanks ($4–$9 wholesale) are made.
Side-Seamed (Open-Width) Knit
The fabric tube is slit open, laid flat, and cut into separate front and back panels, which are then sewn together at both sides. This adds a manufacturing step — and a visible seam down each side — but it gives the finished garment a truer, more consistent shape.
Tubular vs. Side-Seamed: The Real Tradeoffs
| Factor | Tubular Knit | Side-Seamed Knit |
|---|---|---|
| Shape consistency | Can twist or lean after washing (torque) | Holds its shape; less twisting |
| Fit through the body | Boxier, less tapered | Closer, more tailored silhouette possible |
| Print surface flatness | Good, but size grading is less precise | Flatter, more predictable across sizes |
| Manufacturing cost | Lower | Higher (extra cutting and sewing) |
| Typical price tier | Economy blanks | Premium blanks |
Neither is "wrong" — tubular construction is perfectly fine for low-cost, high-volume event shirts. But for a brand or print shop charging a premium retail price, the flatter, more stable platform of a side-seamed tee is usually worth the extra cost, especially on heavyweight styles where torque is more visible.
Collar and Shoulder Construction
Rib-Knit Collars
Most blank tees use a separately knitted rib collar sewn onto the neckline. Look for a collar that's double-stitched and doesn't flare or curl after a few washes — that's usually a sign of a tighter rib knit and better bonding at the seam.
Shoulder Seams
Set-in sleeves (sewn at a defined shoulder point) hold their shape better over time than raglan-style seams on a structured tee, which is part of why interlock-knit styles like our Pima cotton tees use a set-in construction — it keeps the shoulder line clean under a heavy print or embroidered logo.
Why This Matters for Decoration
Construction quality shows up most clearly once you put ink, thread, or a heat-pressed design on the shirt:
- Screen printing: A flatter, more stable panel registers multi-color designs more accurately — read our screen printing blank guide for how fabric surface affects ink lay.
- Embroidery: Side-seamed construction resists the puckering that hoop tension can cause on a tubular knit.
- DTG: Needs a dense, flat knit — construction and GSM work together here, which is also why weight matters so much; see our GSM guide for the fabric-weight side of this decision.
How Blank Mind Shop Builds Its Tees
Our Classic Tee and Relaxed Tee use a dense interlock and jersey knit built for structure and shape retention wash after wash, while the Oversized Box Tee uses a heavyweight boxy construction designed to hold its silhouette without a bulky seam getting in the way of a large chest print. We chose construction details first, fabric weight second — an order most economy blank suppliers skip.
FAQ: Blank Tee Construction
Is a side-seamed tee always better than a tubular one?
Not always — for one-off event shirts where cost per unit matters most, tubular construction is a reasonable choice. For retail-facing brand merch or anything printed in multiple colors, side-seamed construction is the safer bet.
Does construction affect shrinkage?
Indirectly. Shrinkage is driven mostly by fiber content and knitting tension, but a side-seamed garment tends to hold its post-wash shape more predictably because the seam constrains lateral stretch.
How can I tell which construction a blank uses before I buy?
Check the side of the shirt under the arm. A visible stitched seam running from underarm to hem means side-seamed; a smooth, uninterrupted knit means tubular.
Which Blank Mind Shop style is best for heavy embroidery?
The Pima Classic Tee's finer 50-1 yarn and set-in shoulder construction give embroidery a cleaner, flatter base to stitch into.
