A sector, not a rectangle
The wall of a flared cup unrolls flat into part of a ring. Rolled up, it gives the exact cone.
which shape?
It opens straight in the tool.
The workshop journal, sorted by need.
Make a template

Ø 85 × 95 mm
handle 128 × 22
12% shrinkage
SLAB BUILDING · NO WHEEL
SHRINKAGE BUILT IN · A4 & LETTER PDF
— WHAT YOU PRINT
The measurements you enter become a flat pattern, ready to cut.
The wall of a flared cup unrolls flat into part of a ring. Rolled up, it gives the exact cone.
Its diameter lands exactly on the bottom of the rolled wall. The cup closes with no patching.
The unrolled strip plus a C-shaped curve template, so the handle fits the hand, not just the cup.
Leave your email and I'll send it over:

PITFALL NO. 1
−12%
Clay shrinks 10 to 15% as it dries and fires. A template drawn to the finished size always gives a cup that is too small — the most common hand-building mistake, and you only see it when the kiln opens.
You enter the size of the finished piece: the tool works out the rest.
A downloaded pattern only works for one clay and one size. Here, change one value and everything recalculates.
— IN PRACTICE
Nothing to install, no account. Your browser is enough — keep the computer for printing.
1
Enter the diameter, the height, the slab thickness and your clay’s shrinkage. The template updates live.
2
Print your pottery template at 100% — never “fit to page”. A 50 mm check bar on every sheet lets you verify the scale with a ruler.
3
Paper on the slab, knife around it. Large pieces print across several sheets, with assembly marks included.
— FOR REFERENCE
Start from these, then adjust to your clay and your tests.
| Cup | Ø top | Height | Capacity |
|---|---|---|---|
| Espresso | 60 mm | 55 mm | ≈ 3 fl oz (8 cl) |
| Coffee cup | 75 mm | 70 mm | ≈ 6 fl oz (18 cl) |
| Mug | 85 mm | 95 mm | ≈ 11 fl oz (33 cl) |
| Large mug | 92 mm | 105 mm | ≈ 15 fl oz (45 cl) |
| Tea bowl (chawan) | 120 mm | 75 mm | ≈ 14 fl oz (40 cl) |
— FREQUENTLY ASKED QUESTIONS
With slabs. Roll out a 5 mm slab, cut the wall, the base and the handle strip, roll the wall around the base, then attach the handle. The template gives you all three pieces at your measurements.
A cup that’s wider at the rim than at the base is a truncated cone. Unrolled flat, its wall is part of a ring, not a rectangle. Only a straight-sided mug unrolls into a rectangle.
Bend the handle strip over the C-shaped template and let it firm up. When the cup and the handle are equally leather-hard, score and slip both joins, then press the handle on.
A mug about 85 mm across and 95 mm tall holds around 11 fl oz; about 92 × 105 mm gives 15 fl oz. Enter the finished size: the tool adds the shrinkage.
Yes, it’s free and needs no sign-up. Set your measurements, then export a PDF or print directly.
Louis Coffin, a product designer and potter, built Gabarits Céramique to stop working out patterns by hand. Read the story on the About page.
You can print directly or export your template as PDF or SVG.
The library includes cups, mugs, bowls, chawans, plates, serving dishes, bottles, jugs, boxes and vases. Every shape adjusts to your measurements.
No. The templates are made for slab building, no wheel needed.
Yes, the tool offers US Letter as well as A4. Pick the size that matches your printer before exporting.
Check your clay’s data sheet or measure a test tile after firing. Then enter the shrinkage in the tool and fine-tune with your tests.
Print at 100% and check the 50 mm bar. The PDF is designed to give an actual-size template.
— READY TO CUT
Thirty seconds to set the measurements, one sheet of paper to print it.
Free
No sign-up
A4 & Letter PDF

FREE · PRINT AT ACTUAL SIZE
The tool works out the wall, the base and the handle to your measurements, shrinkage included.

Ø 85 × 95 mm
12% shrinkage
— WHAT YOU PRINT
A slab-built cup is three cut pieces. The tool works out all three from the measurements you enter — not from a standard size someone else picked.
The wall of a flared cup unrolls flat into part of a ring. Rolled up, it gives the exact cone.
Its diameter lands exactly on the bottom of the rolled wall. The cup closes with no patching.
The unrolled strip plus a C-shaped curve template, so the handle fits the hand, not just the cup.
Leave your email and I'll send it over:

PITFALL NO. 1
−12%
Clay shrinks 10 to 15% as it dries and fires. A template drawn to the finished size always gives a cup that is too small — the most common hand-building mistake, and you only see it when the kiln opens.
You enter the size of the finished piece: the tool works out the rest.
Here, change one measurement and see the matching flat pattern straight away.
— IN PRACTICE
Three steps
Keep the computer close, then head to the workbench.
1
Shrinkage depends on your clay: enter it to get an accurate template.
2
Never “fit to page”. A 50 mm check bar on every sheet lets you verify the scale with a ruler.
3
Paper on the slab, knife around it. Large pieces print across several sheets, with assembly marks included.
FOR REFERENCE
If you’re not sure which shrinkage to use, start from the value given by your clay supplier.
| Cup | Ø top | Height | Capacity |
|---|---|---|---|
| Espresso | 60 mm | 55 mm | ≈ 3 fl oz (8 cl) |
| Coffee cup | 75 mm | 70 mm | ≈ 6 fl oz (18 cl) |
| Mug | 85 mm | 95 mm | ≈ 11 fl oz (33 cl) |
| Large mug | 92 mm | 105 mm | ≈ 15 fl oz (45 cl) |
| Tea bowl (chawan) | 120 mm | 75 mm | ≈ 14 fl oz (40 cl) |
Suggested slab thickness: 4–6 mm for a cup, 5–7 mm for a large mug.
— FREQUENTLY ASKED QUESTIONS
With slabs. Roll out a 5 mm slab, cut the wall, the base and the handle strip, roll the wall around the base, then attach the handle. The template gives you all three pieces at your measurements.
A cup that’s wider at the rim than at the base is a truncated cone. Unrolled flat, its wall is part of a ring, not a rectangle. Only a straight-sided mug unrolls into a rectangle.
Bend the handle strip over the C-shaped template and let it firm up. When the cup and the handle are equally leather-hard, score and slip both joins, then press the handle on.
A mug about 85 mm across and 95 mm tall holds around 11 fl oz; about 92 × 105 mm gives 15 fl oz. Enter the finished size: the tool adds the shrinkage.
Yes, it’s free and needs no sign-up. Set your measurements, then export a PDF or print directly.
Louis Coffin, a product designer and potter, built Gabarits Céramique to stop working out patterns by hand. Read the story on the About page.
You can print directly or export your template as PDF or SVG.
The library includes cups, mugs, bowls, chawans, plates, serving dishes, bottles, jugs, boxes and vases. Every shape adjusts to your measurements.
No. The templates are made for slab building, no wheel needed.
Yes, the tool offers US Letter as well as A4. Pick the size that matches your printer before exporting.
Check your clay’s data sheet or measure a test tile after firing. Then enter the shrinkage in the tool and fine-tune with your tests.
Print at 100% and check the 50 mm bar. The PDF is designed to give an actual-size template.
— READY TO CUT
Thirty seconds to set the measurements, one sheet of paper to print it.
Free
No sign-up
A4 & Letter PDF
