Brochure Sizing for Mail Drop

I was recently designing some flyers for letterbox drops and had some interesting feedback. Unless you're out there yourself dropping the flyers in each mailbox, you may not realize that the size of the brochure really needs to be designed appropriately to fit in the slots of the mailbox without having to squash and bend it unnecessarily.

If you think about it, an A4 size brochure is never going to fit into a mail box slot, even though this is a very standard sized brochure. You can still have an A4 brochure, but the trick is to design it as a 3 panel - folded to DL. DL (210 x 99mm) will fit very nicely into a mailbox, and can also fit into a DL envelope which is the standard envelope size most people use. This could be very handy if you want to use the post to mail them out instead of dropping the flyers off by hand as well.

Another standard sized flyer is A5 (half an A4). But we have found that although some mailboxes are wide enough to fit in an A5, many are not, and an A5 flyer will often have to be bent and squashed to fit in. This can really ruin the effect of a well designed flyer if it arrives to the potential customer all squished up.

So my advice, for mailbox drops send out DL flyers, or A4 folded to DL 3 panel, or if you really need to send out an A3 brochure, have it folded down to DL beforehand with the proper folding machines so that it still looks professional.


See above for one example of a double sided DL brochure proof.