The three standard flyer sizes
A4 (210 x 297mm), A5 (148 x 210mm) and A6 (105 x 148mm) are the three most common flyer sizes, and each is simply half the size of the one before it. That relationship matters practically: an A5 flyer is exactly two to a sheet of A4, and A6 is four to a sheet, which is part of why these sizes are the standard default rather than something more unusual.A4: the most content, the most visible
A4 gives the most space for detailed content, multiple sections, or a longer message, and it is the most eye-catching size when displayed on a wall, noticeboard or in a window, simply because it is physically the largest and hardest to miss. The trade-off is cost per unit and that it can feel like too much flyer for a very simple, single-message promotion.A5: the most common all-purpose size
A5 is the most widely used flyer size for a reason: it is large enough to hold a clear headline, some supporting detail and contact information, but compact enough to hand out, post through a letterbox or leave in a stack at a counter without feeling oversized. If you are not sure which size to choose and don't have a specific reason to go bigger or smaller, A5 is usually the safest starting point.A6: compact and low-cost
A6 suits a short, simple message, a single offer, a QR code and a date, or use as an insert alongside something else, like a leaflet tucked into a bag or a card handed out at an event. Because more fit on a sheet, A6 tends to be the most cost-effective option per flyer, which matters for very large distribution runs where the message itself is brief.Matching size to how the flyer will be used
Think about where the flyer will physically end up. A flyer meant to be posted through letterboxes or handed to people on the street works well at A5 or A6, since people are more likely to actually keep and read something compact. A flyer meant for display, a shop window, a noticeboard, a counter stand, benefits from the larger A4 size simply because it is easier to read from a distance. Star Printers prints flyers across all three sizes, single or double-sided, so the decision comes down to your content and where it will be seen rather than a printing limitation.Flyer sizes and the ISO 216 standard
A4, A5 and A6 belong to the A series defined by ISO 216, the international paper size standard. Each size is half the one before it: an A4 sheet measures 210 x 297mm, A5 measures 148 x 210mm and A6 measures 105 x 148mm. Because they are standard sizes, they fit common envelopes, leaflet holders and display stands, and they keep paper size and cost predictable.
Flyers, leaflets and folded leaflets
The words leaflets and flyers are often used for the same thing, but a flyer is usually a single sheet, while a leaflet may be folded into panels. Folded leaflets give you more space for information and suit menus and price lists. A5 flyers, leaflets and folded menus are the most popular choice, and flyers printed at A5 are cost effective for large handouts. Leaflet printing and flyer printing use the same paper stocks, so you can choose a lighter paper for flyers handed out in volume, or a heavier one for a premium feel.
Flyer design tips
Good flyer design starts with one clear message. Put the offer or headline first, keep the text short, add a clear call to action and check that contact details are easy to find. When your flyers are printed, a well-designed A5 will usually do more than a crowded A4.