How to Sublimate an Oversized Desk Mat (Step-by-Step) with Craftable Things!

Welcome to Sublimation Camp 2026! If you’ve ever wanted to create a stunning, vibrant, oversized desk mat but felt intimidated by the size, you are in the right place.

Patrice from Craftable Things showed us exactly how to tackle large-scale sublimation without piece-mealing or patching regular sheets of paper together. Whether you want to make a custom gaming mat, a pop of color for your office, or a unique dining table runner, this project is highly sellable and incredibly fun to make.

Let’s dive into the ultimate guide to sublimating an oversized desk mat using a sublimation roll!

Supply List: What You’ll Need

One of the best things about this project is that it doesn’t require a massive list of materials. Here is everything Patrice used to bring this beautiful daisy mat to life:

• Desk Mat Blank: Approximately 12” x 32” (always measure your specific blank!).
• Sublimation Printer: Epson EcoTank 15000 (converted with sublimation ink).
• Sublimation Paper: A 13” wide sublimation paper roll.
• Paper Cutter: Cricut paper slicer or scissors.
• Sizing Tools: Measuring tape or an inch ruler.
• Prep Supplies: Lint roller and heat tape.
• Protection: Butcher paper (to protect the top and bottom of your press).
• Safety Gear: Heat-resistant gloves.
• Heat Press: A standard flatbed heat press (16” x 24” Fancier Studio press).
• Leveling Help: A small table, shipping box, or board to place next to your press to keep the long mat level as you pull it through.

Step 1: Measure Your Blank

Never rely blindly on the box dimensions! Grab your measuring tape and measure the actual width and height of your desk mat blank.

Pro Tip: Stretching the mat out completely is crucial. Patrice’s mat measured just under 12” wide and about 31.5” long. To ensure full coverage with zero white edges, plan a design that is slightly larger than the mat (about 12.5” by 32”).

Step 2: Set Up Your Software & Design

You can use Adobe Illustrator, Silhouette Studio, or any design software that allows you to customize canvas sizes.

1. Canvas Sizing: Set your artwork canvas to 13” wide by 36” high to accommodate the roll paper size.
2. Rotate Your Design: Place your horizontal design onto the canvas and rotate it 90∘ so it runs vertically up the page.
3. Print Settings: Select the Epson ET-15000. Under Page Setup, create a custom paper size of 12.95” x 36”.
   • Why 12.95”? Setting it exactly to 13” can sometimes trigger paper size errors on the ET-15000 driver. Trimming that tiny fraction saves you a major headache!
4. Mirroring: Ensure your design is set to Flip Horizontally (mirrored) before sending it to the printer. Set the quality to normal and feed from the rear tray.

Step 3: Prep and Load the Paper Roll

Using a roll means you don’t have to tile and tape multiple sheets together, meaning no seam lines on your final print!

1. Unroll your sublimation paper and use your paper slicer to cut a sheet to roughly 34” or 36” long.
2. The Water Trick: If you can’t tell which side of the roll is the print side, dampen your finger with a tiny drop of water and touch the corner of the paper. The side that feels tacky or “clammy” is the print side.
3. Adjust the rear paper guides on your printer to the wide format width.
4. Insert the paper into the rear tray. Because it’s a long, single sheet with less initial support, hold it gently as the printer grabs it to ensure it feeds straight.

Step 4: Prep Your Blank

Sublimation heat will permanently bake any dust, lint, or stray hairs into your blank, turning them into blue or black specks.

• Thoroughly lint roll the entire surface of your blank.
• Give the mat a quick pre-press for a few seconds in your heat press to remove any moisture and flatten out curls.

Step 5: Tape Down the Design

Lay your printed image face up, and place your desk mat face down on top of it.

• Center the mat so you have a little bit of design “overage” on all sides.
• Secure the mat to the paper using a generous amount of heat tape.
• Crucial Warning: Do not wrap the tape around onto the back of the mat where the heat platen will press directly over it. This can block the heat/ink transfer and cause unappealing white spots on the edges of your design. Keep the tape flat on the paper and the black rubber backing.

Step 6: The Multi-Press Method

Unless you own a massive 36” industrial press, you will need to press this long mat in two sections.

1. Line the Press: Place a sheet of butcher paper on the bottom platen to catch any ink bleed.
2. Position Part 1: Lay the first half of your taped mat onto the press. Set up your secondary table or box next to the heat press so the remaining half of the mat rests flat and doesn’t dangle or pull.
3. Cover: Place another piece of butcher paper over the top of your design.
4. Press Settings: Press at 385∘F for 45 seconds with firm pressure.
5. Shift & Position Part 2: Put on your heat gloves (the mat will be incredibly hot!). Carefully slide the mat through the press to position the unpressed second half onto the platen.
6. Press Again: Lower the platen for another 45 seconds.

The Big Reveal!

Once both sides have been pressed, remove the mat from the heat press. Let it cool slightly, peel off the heat tape, and pull away the paper.

The result? An absolutely gorgeous, incredibly vibrant, professional-grade desk mat! The ink fuses flawlessly into the fabric fibers, leaving you with a smooth, oversized mouse pad ready to brighten up any workspace.

Do you plan on making one of these for your own craft space, or are you looking to add custom desk mats to your online shop?