What size rhinestones fit a tumbler?
A tumbler is a curved surface, so the stone size is decided by the radius before it is decided by taste. The count then follows from the wrap area.
SS10 stones at 2.8 mm are the default for a 20 oz tumbler, because they follow a 3.5 inch radius without visible gaps. Use SS6 for fine lettering and tight curves, and SS16 only on flat lids. A full wrap takes about 4,815 SS10 stones, which is 34 gross.
The can radius decides the stone size, not the design
A 20 oz tumbler has a body radius of about 3.5 inches. On a curve, the outer edge of a stone has to travel further than its inner edge, so a large stone on a tight radius leaves a gap on the inside of the bend.
The rule of thumb in practice:
- SS6 (2.0 mm) — tight radii under about 2.5 inches, fine lettering, small caps and lids.
- SS10 (2.8 mm) — the default for a 20 oz body. Balances coverage speed and gap-free wrapping.
- SS16 (3.9 mm) — flat lids, wide 30 oz bodies, large graphic blocks. On a 3.5 inch radius it starts to lift at the corners.
SS20 and above belong on flat panels. On a tumbler they bridge the curve and the transfer cannot press them down evenly.
How many stones a tumbler wrap takes
A standard 20 oz tumbler has a circumference of about 9.5 inches (241 mm) and roughly 8 inches (200 mm) of usable height. Multiply the two and divide by the area one stone occupies.
| Coverage | Area | SS10 stones | Gross |
|---|---|---|---|
| Full wrap, 241 x 200 mm | 48,200 mm² | 4,815 | 34 gross |
| 100 mm band | 24,100 mm² | 2,408 | 17 gross |
| 50 mm band | 12,050 mm² | 1,204 | 9 gross |
| Full wrap in SS6 | 48,200 mm² | 8,234 | 58 gross |
These counts assume offset rows with a 0.6 mm gap. A name in lettering fills about 40% of its box, so a 200 x 60 mm name uses about 480 SS10 stones rather than 1,200.
Row spacing that stops visible gaps on a curved tumbler
On a flat surface the gap only affects weeding. On a cylinder it also decides whether you can see the can between the stones.
A 0.6 mm gap at 2.8 mm stones gives about 78% coverage, which reads as solid from arm's length. Push the gap to 1.0 mm and coverage drops to roughly 64%, and the metal starts to show through at the curve.
If you are wrapping a full 200 mm band, cut the gap to 0.5 mm for the band and keep 0.6 mm for lettering, so the letters stay legible without the background going solid.
Cutting a tumbler template that survives the curve
- Measure the circumference with a cloth tape, not a ruler. A 30 oz body is about 10.5 inches, not 9.5.
- Set the finished width to the circumference and the height to the band you want.
- Print at 100% and check the 25.4 mm line. A 2% shrink across a 241 mm wrap loses nearly 5 mm of stones.
- Cut the template in mylar rather than paper if you will reuse it. Paper tears along the seam when you wrap it.
- Tape the template to the tumbler at one edge first, then work around the curve so the overlap lands where the seam will be.
Opens at 241 mm wide, the circumference of a 20 oz tumbler, with SS10 and a 0.6 mm gap.
Questions about rhinestones on tumblers
What size rhinestones for a 30 oz tumbler?
SS10 still works on a 30 oz body: the radius is about 4 inches, slightly easier than a 20 oz. The wrap is longer at roughly 10.5 inches circumference, so a full wrap takes about 5,300 SS10 stones instead of 4,815.
How many stones to bling a tumbler with a name only?
A single name about 200 mm wide and 60 mm tall in SS10 uses roughly 480 stones, which is 4 gross with a margin. That is the common order size for a first tumbler.
Do I need a special template material for a curved surface?
Mylar or a mesh-backed template sheet works better than paper on a cylinder, because it bends without creasing. Creases deform the hole spacing exactly where the template has to follow the curve.
Can the maker handle a full tumbler wrap?
Yes. A 241 mm circumference is well inside the 25 to 600 mm width range, and the tiled PDF splits any pattern that is taller than one sheet. A full 200 mm wrap usually lands on two Letter sheets.