A bar coaster is specified by three things: what it is made of, how thick it is, and whether it is a standard shape or a die cut. Get those three right and everything else is artwork. Get the thickness wrong and you have 5,000 coasters that curl the first time a glass sweats on them.
Here is how coasters are actually specified.
Quick answers
Pulpboard is the standard bar coaster material. Thick, absorbent, matte.
Thickness is the spec that matters most. Thin board curls and pulps. Thicker board survives a shift.
Round and square are stock shapes. 3.5 inch round and 4 inch square are the common ones.
Die cut shapes run at a minimum of 500, the lowest minimum on the range.
Standard shapes run at a minimum of 5,000.
Pulpboard, and why coasters are not just thick paper
A proper bar coaster is pulpboard. It is a bulky, absorbent board made to soak up condensation and hold together while wet. That absorbency is the entire point. A coated or laminated board looks sharper and sheds water onto the table instead of taking it in, which defeats the purpose.
This is the trade to understand before you pick a finish. Absorbent means matte, slightly textured, and a little soft in the hand. It also means ink sinks in, so colours read slightly muted compared to a proof on coated stock.
If you want a glossy coaster, you can have one, but you are buying a drinks mat rather than a coaster, and you should know that is the choice you are making.
Thickness
Thickness is where most first orders go wrong, because it is the one spec people leave off the brief.
Thin board is cheaper and feels it. Under a cold glass on a warm night it absorbs, swells, curls at the corners and starts to break down within a single service. Guests pick at the edges. The coaster looks tired an hour in.
Thicker board costs more per unit and behaves like a coaster should. It stays flat, it takes repeated condensation, and it still looks like a considered object at the end of the night.
For a bar where coasters go out under every drink and get looked at, spend the difference. The per-unit gap is small and the difference in how the bar reads is not.
For a one-night event, a thinner board is defensible. Nobody is judging the coaster on night two.
Say what the coaster is for when you request a quote, and ask for the thickness to be recommended against that use. That is a better brief than naming a number you found somewhere.
Shapes and the 500-piece door
Two minimums apply, and the gap between them is the most useful thing on this page.
Standard shapes run at 5,000. Round and square, in the common sizes. This is the normal bar order.
Die cut shapes run at 500. Cut to an outline you supply. A bottle silhouette, a logo mark, a hexagon, whatever the shape is.
Five hundred is the lowest minimum anywhere on the foodservice range. It is lower than coffee sleeves at 5,000, lower than napkins at 10,000, and a fraction of the 10,000 per size on cups.
That makes die cut coasters the cheapest way to get a genuinely custom, physically branded object onto a counter. For a bar opening, a pop-up, a launch event, a market stall or a brand testing whether printed material does anything for it, 500 die cut coasters is a real order at a small commitment.
It is worth saying plainly: if you want to print something custom and 5,000 or 10,000 is too much stock to carry, this is the item to start with.
Sizes
3.5 inch round. The default bar coaster. Fits under a pint, a rocks glass and most wine.
4 inch square. Slightly more presence and a bigger print area. Common in cocktail bars.
Larger squares and rounds. Available, and they start to read as a drinks mat rather than a coaster. Fine if that is the intent.
Die cut. Any outline. Keep it simple. Deep concave curves and thin protruding elements are fragile in pulpboard and will break in a stack.
Printing on pulpboard
Pulpboard takes ink well for bold work and poorly for fine work.
What works: solid blocks of colour, strong wordmarks, simple line art, one or two colours, reversed-out type at a decent weight.
What does not: fine serif type at small sizes, hairlines, gradients, tight two-colour registration, photographic images.
Plan for edge-to-edge coverage to be slightly imprecise. Pulpboard is cut, not trimmed to the fraction of a millimetre, so a design with a thin border all the way round will show the variation. Either go full bleed or leave a generous margin. A 2mm border is the worst choice.
Both sides are printable. The back of a coaster is underused space. A drinks list, a hashtag, a QR code to a menu, opening hours. It costs less than most people assume because the sheet is already going through the press.
What to send for a quote
Shape. Standard round or square, or a die cut outline.
Size.
Quantity. Remembering 5,000 standard, 500 die cut.
One side or two.
Artwork, ideally vector, and a note on what the coaster is for so thickness can be matched to the use.
Pricing comes back at two quantity breaks so you can see what the next tier saves, and it lands in two business days. Production runs 6 to 8 weeks by sea and moves faster on repeat runs of the same artwork.
Bar mats
Worth knowing they exist as a separate item. A bar mat is the long rubber or absorbent runner that sits on the service rail, not on a table. Different material, different order, same job of being a branded surface a bartender looks at all night. If you are kitting out a bar rather than dressing a table, ask about both.
Food contact
A coaster does not usually touch food directly, but it sits under a drinking vessel and it is handled constantly, so it should still be made to food contact standards. The relevant FDA rules for paperboard are in 21 CFR 176. Ask for the documentation in writing before you order.
Where to go next
For shapes, thicknesses and bar mats, see custom bar coasters.
If you are dressing a bar rather than just a table, napkin sizes and ply explained covers why the 5 x 5 beverage napkin is the other item worth printing, and what ply to run.
For the full counter and bar range, see custom food packaging.
