Every week we get design files from new brand founders who want custom T-shirts made. About half of those files can’t go into production as-is. The colors are wrong for the print method they chose. The artwork resolution is too low to reproduce at the size they want. The design looks great on a mockup and terrible on fabric because nobody thought about how ink sits on 200gsm cotton.
Knowing how to design t-shirts is not the same as knowing how to make a nice graphic in Photoshop. A design that works on screen but can’t survive the production process is not a design. It’s a wish.
Here’s what actually makes a T-shirt design production-ready.
Pick the Blank Before You Touch the Design
This sounds backwards but it’s the correct order. The T-shirt itself constrains what your design can be, and ignoring this is the single most common reason first orders come back looking “off.”
Fabric weight. A 180gsm ringspun cotton tee has a smooth, tight surface. Fine detail prints well on it. Thin lines, small text, photographic images through DTG all work. A 260gsm heavyweight cotton tee has a rougher, more textured surface. That same fine-detail design will look slightly fuzzy because the ink fills the fabric texture unevenly. On heavyweight blanks, bold graphics with thicker lines and larger shapes always look better than intricate artwork.
This isn’t theoretical. We had a client send us a design with 0.5mm hand-drawn linework. Looked stunning on screen. On the 250gsm cotton blank they picked, the lines bled into the texture and half the detail was lost. Same design on a 160gsm ringspun tee looked perfect. The artwork was fine. The fabric choice was wrong for that artwork.
Yarn type matters too. Ringspun cotton is spun into finer threads, producing a smoother fabric surface that takes ink better. Combed cotton is ringspun with an extra step that removes short fibers, so it’s even smoother. Carded cotton (also called open-end) is rougher and cheaper. Most budget blanks under $3 are carded cotton. If your design has any fine detail, specify ringspun or combed in your order. Don’t leave it to the factory to decide.
Fabric color. If you’re designing for white or light tees, your full color range is open. If you’re designing for black or dark tees, the rules change completely. Screen printing on dark fabric requires a white underbase layer printed first, then your colors on top. This adds one extra screen to your setup cost and makes the print feel slightly thicker. DTG on dark fabrics also requires a white ink base that adds a rubbery feel. Sublimation doesn’t work on dark fabrics at all because the dye is transparent. These aren’t artistic choices. They’re physics.
Fabric shrinkage. Non-pre-shrunk cotton can shrink 5 to 8% after the first wash. If your design is positioned “8cm below the collar” on a non-pre-shrunk blank, that position shifts after the customer washes it. The print doesn’t shrink with the fabric evenly, especially on screen prints, because the ink layer is slightly rigid. This causes a subtle warping effect that’s hard to explain to a customer. Pre-shrunk or pre-washed blanks solve this. If your manufacturer offers them, pay the small upcharge. If they don’t, account for shrinkage when setting your print placement.
Decide your blank first: fabric weight, yarn type, fabric color, pre-shrunk or not, fit (regular, oversized, slim). Then design within those constraints.
How to Design T-Shirts Around Your Print Method
This is where most first-time designers get stuck. Each print method has hard physical limits that change what your design can and can’t do. Choosing the wrong method for your artwork doesn’t mean a slightly worse result. It means the design doesn’t work at all.
Screen printing. Still the standard for bulk T-shirt production and the method you’ll use most often above 200 pieces. Each color in your design needs a separate screen. A 1-color logo is one screen ($20 to $40 setup). A 3-color chest print is three screens. Setup cost per screen gets amortized across your order, so a 6-color design on 50 shirts is expensive per unit, but the same design on 500 shirts is barely noticeable in the unit price.
The design constraint: you’re working with spot colors, not continuous tone. No smooth gradients, no photographic images, no soft blending. Each color is a flat, opaque layer. You can simulate gradients using halftone dots (tiny printed dots of varying sizes that trick the eye into seeing a gradient), but halftones have a visible dot pattern up close and they look distinctly screen-printed. Simulated process printing uses halftones of 4 to 8 colors to approximate photographic images on dark shirts. It can look impressive but it requires an experienced printer who knows color separation well. Don’t assume every factory can do it.
Two ink types you need to know about: plastisol sits on top of the fabric as a solid layer. It’s opaque, vibrant, and durable, but it has a definite “hand” (you can feel the print). Water-based ink soaks into the fabric fibers, producing a softer feel with no raised texture, almost like the design was dyed into the shirt. Water-based prints look and feel more premium, but the colors are less vivid on dark fabrics and the print wears down faster. For a vintage, soft-hand feel, water-based is what you want. For maximum opacity and durability, plastisol.
Maximum print area on a standard adult tee is roughly 30 x 40cm for a front or back print. Larger than that and the screen frame exceeds standard platen sizes, which either limits your factory options or spikes the cost.
DTG (direct-to-garment). A digital printer sprays ink directly onto the fabric. Full color, unlimited colors, photographic images, gradients, all possible. No screen setup, so it’s cost-effective for short runs (10 to 100 pieces). Above 200 pieces, screen printing is almost always cheaper.
DTG prints look best on 100% cotton, preferably ringspun, preferably light-colored. On polyester blends above 35%, the ink doesn’t bond properly and washes out. On dark cotton you need a white underbase that adds processing time and stiffness. DTG prints also fade faster than screen prints over repeated washing. After 30 washes, a DTG print on a properly pre-treated shirt might lose 10 to 15% of its vibrancy. A plastisol screen print in the same conditions barely changes. If your brand relies on long-term wearability as a selling point, this matters.
One thing nobody tells you: DTG quality varies wildly between machines and operators. The pre-treatment (a spray applied to the fabric before printing that helps ink adhesion) is the most critical variable. Too little pre-treatment and the ink sits on the surface and washes off. Too much and you get a visible stain around the print area. A factory that’s dialed in their DTG process will show you consistent results. A factory that just bought a DTG printer six months ago will not.
Puff print. A specialty screen print where the ink expands under heat to create a raised 3D texture. This is the “it” method in streetwear and it’s the most common request we get from brands targeting the 18 to 30 market. Looks incredible on heavyweight blanks (300gsm and above).
The hard constraints: minimum line width of 2 to 3mm. Anything thinner and the puff expansion blurs the edges until the detail disappears. Small text under about 8mm letter height doesn’t puff cleanly. Puff print adds $1 to $3 per piece on top of standard screen print costs, and the puff ink is thicker than regular plastisol, so it needs a different screen mesh (lower mesh count, around 60 to 86 threads per inch vs 110+ for standard plastisol). If your manufacturer quotes puff print at the same price as regular screen print, ask questions.
Embroidery. Thread stitched directly into the fabric. Best for small logos (under 10cm wide). Stitch count drives cost, so large embroidered designs (full chest, full back) get expensive fast. Color changes are limited to the number of thread heads on the machine, typically 6 to 12 colors per design without re-threading. Gradients are mechanically impossible. Photographic images do not embroider. What embroidery does better than any print method: it lasts forever and it communicates “premium” instantly. A small embroidered chest logo on a 260gsm blank reads higher-end than the same logo screen printed.
If you’re figuring out how to design t-shirts for a new brand, decide the print method before you finalize the artwork. The method is the frame. The design fills the frame.
File Specs That Don't Get Rejected
Your manufacturer doesn’t need a Canva link or an Instagram screenshot. They need production files. Here’s what that means.
Vector files (AI, EPS, PDF) for any design that will be screen printed, vinyl cut, or embroidered. Vector artwork scales to any size without losing quality. If your logo was built in Canva or Photoshop as a raster image, it needs to be redrawn as vector before screen printing. A freelance designer on Fiverr or Upwork can do this for $20 to $50. It’s not optional.
High-resolution raster files (PNG, TIFF, PSD) for DTG printing. Minimum 300 DPI at the actual print size. If your design will print at 30cm wide on the garment, the file needs to be 30cm wide at 300 DPI. A 72 DPI web image blown up to 30cm will print blurry, and there is no factory-side fix for low resolution.
Color specification. CMYK for DTG. Pantone spot colors for screen printing. Your screen shows RGB. RGB neon green and CMYK neon green are very different greens because the CMYK gamut is physically narrower. For screen printing, specify Pantone PMS numbers for every color. “Make it the same blue as our website” is not a spec. Pantone 2728 C is a spec. If you don’t have Pantone numbers, your manufacturer can do a color strike-off (a test print on the actual fabric) so you can approve the color before bulk. A strike-off costs $10 to $20 and prevents a $2,000 mismatch.
Print placement with measurements. “Center chest” is not a placement. “Center of chest, 8cm below the collar seam, design width 22cm, centered horizontally” is a placement. Mark it on a flat sketch or a tech pack diagram. Include placement for every print location (front, back, sleeve, inside neck label). Left and right are always from the wearer’s perspective.
One question nobody asks but should: does the print scale across sizes? On a size Small tee, a 22cm wide chest graphic might look balanced. On a size XXL, the same 22cm print looks small because the garment is 15cm wider. Most brands keep the print size fixed across all sizes (simpler, cheaper). Some premium brands scale the print proportionally (adds pattern complexity). Decide this before your sample, not after your first XXL customer complains that the logo looks tiny.
Mistakes We See Every Week
Designing at Instagram scale. The design looks incredible as a 1080 x 1080 post. Then it gets printed at 30cm wide and the detail is gone because the source file was 72 DPI. Design at production size from the start. If you’re unsure, print your design file at actual size on a home printer and tape it to a shirt. That’s closer to reality than any screen mockup.
Too many colors for the budget. A 7-color screen print on 100 tees costs more in setup fees than the shirts themselves. If your order is under 200 pieces, keep screen print designs to 1 to 3 colors. Save the complex artwork for DTG or for when your volumes justify the setup costs. A 2-color design printed well will always outsell a 6-color design printed cheaply.
Ignoring seam lines. If your design extends to the side of the shirt, it will hit the side seam. The seam interrupts the print and leaves a visible gap or distortion. Keep your design at least 2cm from the side seams on standard cut-and-sew tees. The only way around this is cut-and-sew sublimation (where the fabric is printed flat before assembly) or all-over DTG printing with specialty equipment that most factories don’t have.
Not accounting for fabric stretch. Knit cotton stretches horizontally when worn. A circular design will stretch into an oval across the chest. A 1:1 perfect circle in your file will not look like a perfect circle on a body. Experienced designers compensate for this by making circles slightly taller than wide in the file (roughly 97% width to 100% height), so the stretch corrects it to a circle on the body. This is a detail-level adjustment that separates someone who’s done this before from someone who hasn’t.
Treating the mockup as the final product. Placeit, Printful’s previewer, and Canva mockups show you an approximation. The fabric texture, the ink opacity, the way the print sits on a curved human body, the way the color shifts from RGB to CMYK are all different from a flat digital rendering. Always request a physical sample. Always.
If you’ve got a design and you’re not sure whether it’s production-ready, send it over with your specs and we’ll tell you straight. We also have a full walkthrough of the production process and a fabric guide if this is your first custom order.
