Tumbler Wrap Template Generator
A 20 oz skinny tumbler is tapered — the top is wider than the base — so its wrap is not a rectangle. It's a curved fan shape. This tool computes the exact shape from the real cone geometry, warps your artwork onto it, and hands you an SVG or PNG. Everything runs in your browser — your file is never uploaded.
Top diameter
Bottom diameter
Height
Add artwork above to enable the warped wrap export.
Preset sizes are nominal starting points and suppliers genuinely differ — Hogg, Maars, Polar Camel and generic imports all vary by a tenth of an inch or so, which is enough to leave a white sliver at the seam. Measure your own blank and use Custom for a guaranteed fit — our guide to measuring a tumbler for a wrap template walks through taking the three measurements accurately. Sources: MakersMath, MakersPage, The Stainless Depot.
How the four presets unroll
The four presets are not four sizes of one shape — they are four different cones. A 20 oz skinny loses a quarter inch of diameter over eight inches of height, and a taper that lazy puts the apex a long way off: extend its sides until they meet and the point sits 94.7 inches away — nearly eight feet. The wrap is a 5.62° slice of a circle almost sixteen feet across. That is exactly why the template looks so nearly rectangular, and why eyeballing it as one is such a tempting shortcut. Add taper and the radius collapses: the 40 oz Quencher sheds 0.85 in of diameter over 9.3 in, its apex comes in to 42 in, and the curve is obvious to the naked eye.
Everything below is what the tool produces at the default 0.125 in seam and 0.0625 in bleed.
| Preset | Top ⌀ | Bottom ⌀ | Height | Sweep | Fan radius | Sheet | At 300 DPI | Top arc | Bottom arc |
|---|---|---|---|---|---|---|---|---|---|
| 20 oz skinny — tapered | 2.96" | 2.71" | 8.00" | 5.62° | 94.7" | 9.551 × 8.236" | 2865 × 2471 px | 9.299" | 8.514" |
| 20 oz skinny — straight | 2.94" | 2.94" | 8.25" | rectangle | — | 9.486 × 8.375" | 2846 × 2512 px | 9.236" | 9.236" |
| 30 oz skinny — tapered | 3.37" | 2.87" | 8.30" | 10.84° | 56.0" | 10.832 × 8.652" | 3250 × 2596 px | 10.587" | 9.016" |
| 40 oz Quencher style | 3.85" | 3.00" | 9.30" | 16.43° | 42.2" | 12.319 × 9.785" | 3696 × 2936 px | 12.095" | 9.425" |
The arc columns are just the rim circumferences unrolled — π × diameter — which makes them a free check on whether a preset is really your blank. Wrap a paper strip round the rim and measure to the overlap mark: if it misses the top arc above by more than a few hundredths, type your own numbers in. A tenth of an inch between suppliers is completely normal.
Measuring a blank that isn't in the list
The tool needs three numbers, and it will draw a flawless template for the wrong tumbler if you feed it the wrong three. Our guide to measuring a tumbler for a wrap template covers technique in depth; this is the order that keeps the tool honest.
- Switch the dropdown to Custom first. Editing any dimension box flips it to Custom on its own, so a preset can never overwrite you — but choosing it yourself swaps the note underneath for the reminder of what to measure.
- Take the outside diameter at the rim. Calipers across the widest point are quickest, but a paper strip works too: wrap it round the rim, mark the overlap, divide by π. That is not an approximation — the readout prints the top arc beside π × ⌀ so you can watch the two agree.
- Measure at the rim, not under the lid lip. Many blanks step inward just below where the lid seats, and a caliper that slides into that step reads a diameter belonging to no part of the printable surface.
- Repeat at the base — on the blank you are actually printing. A powder-coated body carries paint that a bare stainless one does not, so two blanks sold as one size can differ by thousandths. Over eight inches of wrap that is enough to open a hairline of bare metal at the seam.
- Take the height with the lid off, then read the sheet back. Height is the straight run of printable wall. With all three in, check the readout: slant should match √(h² + Δr²) and both arcs their π × ⌀ figures.
Three ways a wrap comes out wrong
It was printed as a rectangle
Usually this happens downstream: someone sees a shape that is 94% rectangle and rebuilds it as a clean one to tidy the layout. On a 20 oz skinny the top rim needs 9.299 in of material and the bottom needs 8.514 in — a difference of 0.785 in, exactly π × the quarter inch of taper. Give both rims equal width and that 0.785 in has to go somewhere: it becomes a pucker along the base and a seam that closes at one end and gapes at the other. On a 40 oz the mismatch is 2.67 in.
The two arcs got swapped
The outer arc is always the wider rim, which on a normal tumbler is the top. The tool does not assume it — it hands the outer arc to whichever diameter you entered as larger, which is what lets it handle a flowerpot or an inverted taper. The cost is that transposing your two measurements yields a perfectly valid template for an object you do not own, with no warning. The sheet captions read TOP RIM and BOTTOM with the diameters attached; read them before you print.
The seam was treated as a butt joint
Seam allowance is overlap, not spare paper to trim to. At the default 0.125 in per side the sheet carries an extra 0.25 in of arc at the top rim and 0.229 in at the bottom, so a quarter inch of your design lands on top of itself as the wrap closes — visible immediately on lettering, a border or a stripe. Artwork you drop in is also stretched to fill the whole sheet, allowances included, and then warped, so that outer eighth of an inch is design you will lose. Keep anything that matters well inside the dashed trim line.
Frequently asked questions
Why isn't a 20 oz skinny tumbler wrap just a rectangle?
Because the tumbler is tapered — the rim is wider than the base. A shape like that is a cone frustum: a cone with the pointy end cut off. If you slit a frustum down one side and flatten it, you never get a rectangle — you get a slightly curved fan (an annulus sector). Wrap a true rectangle around a tapered tumbler and it will pucker, and the top and bottom edges will drift out of level. Only a straight-sided tumbler unrolls into a real rectangle.
What is the actual math behind the shape?
With a top radius rₜ, a bottom radius rₖ and height h, the slanted side length is s = √(h² + (rₖ − rₜ)²). Extending the taper to the cone's apex puts each rim at an apex distance of R = r × s / |rₖ − rₜ|, and the fan opens by an angle of θ = 2π |rₖ − rₜ| / s. Those fall out neatly: the gap between the two arcs equals exactly s (the slant), the outer arc measures exactly π × the top diameter, and the inner arc measures exactly π × the bottom diameter — which is just each rim's circumference, unrolled.
What happens with a straight-sided tumbler?
The math politely falls apart, and that's the correct answer. If the top and bottom diameters are equal there is no taper, so there is no apex to measure from — the cone's tip runs off to infinity and the formula divides by zero. Geometrically the fan flattens out into a rectangle of exactly π × diameter wide by h tall. This tool detects that case and switches to the rectangle directly instead of trying to draw a fan with an infinite radius.
How much seam allowance and bleed should I use?
For sublimation, roughly 1/8" (0.125") of extra width on each side is typical — it gives you overlap at the seam so no bare metal shows if the wrap shifts while you're taping it down. A little bleed (1/16", 0.0625") past the top and bottom rims covers the same risk vertically. If you're printing vinyl and cutting to the line, you can drop both to zero. The dashed line on the template is the true tumbler surface; the solid outline is the sheet including your allowances. Those inch measurements become pixels at whatever export resolution you pick — DPI vs PPI explained covers that conversion.
Is my artwork uploaded anywhere?
No. The file is read locally with the browser's FileReader and warped on an HTML canvas — nothing is sent to a server and nothing is stored. You can disconnect from the internet once the page has loaded and the tool will keep working exactly the same.