GSM Weight Guide: Choosing the Right Blank T-Shirt for DTG, DTF, Screen Print & Embroidery

Ask any print shop what ruins a good job and "the wrong blank" comes up more than the artwork ever does. Fabric weight — measured in GSM (grams per square metre) — decides how ink sits, how detail holds, and how the finished piece feels in a customer's hands. Get it wrong and a photographic DTG print sinks into a thin, loose knit; get it right and even a single-colour screen print looks retail-ready. Here's how to match GSM to your method, using stock we keep ready to ship from our UK blank garments collection.

What GSM Actually Tells You

GSM is simply how much a square metre of fabric weighs. Lightweight tees sit around 140–180 GSM, mid-weight around 180–220, and heavyweight blanks — the kind streetwear brands now expect — run 250 GSM and up. Higher GSM means a denser, flatter knit surface. That matters for printing because a dense face gives the print head or screen a stable, even canvas, so fine detail lands sharply instead of disappearing into gaps between loose fibres. It also means the garment survives more wash cycles without going baggy, which protects your print from cracking as the fabric moves.

Matching GSM to Your Print Method

DTG and DTF: Direct-to-garment thrives on high cotton content and a tight, smooth face. A heavyweight 100% cotton blank in the 300–320 GSM range gives the ink a dense surface to bind to, so photographic and full-colour designs stay crisp rather than fuzzy. Our Blank Ultra Heavy T-Shirt 320 GSM and the Heavy Oversized 300 GSM Tee are both built for exactly this — a flat, ring-spun face that holds detail through 50-plus washes.

Screen printing: Screen print lays down a thicker ink film and is the most durable method for bulk runs, and a heavier blank stands up to the platen pressure and flash curing without warping. The same 300–320 GSM tees handle spot colours and bold graphics cleanly, and the extra weight stops the shirt stretching out of registration on multi-colour jobs.

Embroidery: Stitching needs structure. Thin jersey puckers under thread tension, so a firmer, heavier base — or a hoodie — gives your digitised design a stable foundation. For layering-season merch and embroidered chest logos, the Heavy Long Sleeve 325 GSM Tee and our Heavyweight 500 GSM Hoodie give needlework something solid to bite into.

Don't Over-Buy Weight for the Wrong Job

Heavier isn't automatically better. A 500 GSM hoodie is superb for embroidery and premium retail, but you don't need that mass for a simple one-colour promo tee where cost-per-unit matters more than heft. The trick is to spec the lightest weight that still gives your method a clean, stable surface — usually 300–325 GSM for tees taking print, and heavier only where structure or a premium hand-feel is the selling point. Because we stock everything in England with no minimum order, you can order a couple of samples in different weights, run them through your machines, and settle on the blank that prints best before committing to a full run.

Test First, Then Scale

Every DTG printer, screen setup and embroidery machine behaves slightly differently, so the smartest move is to test your exact artwork on the actual blank before a big order. With no minimums and fast UK dispatch, sampling costs you a few pounds and a day, not weeks of overseas lead time. Browse the full heavyweight blank garments collection to compare weights, then order a test piece and let your own machines make the final call.