Trim size (drawing A4, printing A5): 289x202mm Trim size (drawing A3, printing A5): 408x285mm Trim size (drawing A3, printing A4): 412x289mm It’s probably easier just to give you the box sizes for the trim area. OK, so the reason that this is annoying is that A3 is ~137.5% of A4 +3mm bleeds widthways and ~138.5% of A4 + 3mm bleeds in height. We’ll do it close enough for government work. I’m sure that someone good at maths could, but that’s not the situation we’re confronted with. This is a little more complex to work out – you can’t really do it precisely. You want to use the whole sheet, because you paid for that sheet, darn it, but you want to make sure you’re leaving the correct bleeds for your A4 comic because you love your printer and don’t want them to be sad. OK, so you’ve got your piece of A3, which is 420x297mm. If in doubt when sizing round whatever you get for the bleed UP to the nearest millimetre and whatever you get for the trim DOWN. These won’t give you 100% exact 3mm bleeds, but it’ll get you close enough that we should be able do the rest. Now you’re drawing in scale for your target size, so as long as you don’t fiddle with anything when scanning you can be sure that you’ve got the right aspect ratio for printing.Īs long as you’re working with a sheet of paper in the “A” sizes this multiplication will work for any target size, not just the UK and US standards. So mark those areas out on your A3 sheet (rounding to the nearest millimetre unless you have a very fancy ruler and a very steady hand) and either trim away the waste or mentally discard it. So if Rik’s working on an A3 sheet and he wants to mark out the bleed and trim areas for printing to the US Standard he needs to do the following: Take the dimensions of your target size and multiply them by 1.41 to get the dimensions of your working area. You need, therefore, to know the conversion between A4 and A3 to make sure you’re drawing in scale…Ī3 is ~141% of A4 (and A4 is ~141% of A5 and so forth). But for many artists A4 is a bit fiddly & small to work with – you’re more likely to want to work to A3 and scale down to A4. If you’re drawing at life size on an A4 sheet of paper this is simple – mark out the bleed and trim areas for your target size and make sure you stay inside the lines. US Standard: 260x170mm Trim Size, 266x176mm Bleed SizeĪ4: 297x210mm Trim Size, 303x216mm Bleed Sizeīoth the target sizes fall between A5 and A4, so they both require an A4 slot on the print sheet. UK Standard: 240x157mm Trim Size, 246x163mm Bleed Size The dimensions we’re working with are:Ī5: 210x148mm Trim Size, 216x154mm Bleed Size This works for both the US and UK Standards (which are the most popular sizes). If printing between A5 and A4 treat it like it’s A4 Rik needs to know the dimensions to mark out as the working area on his A3 sheet. Most art supply stores will sell paper in the standard “A” sizes, and those don’t scale perfectly into either the US Standard or the UK Standard (if you scale A4 down by height the US Standard goes to 260x184mm – 14mm wider than desired – and the UK Standard goes to 240x170mm – 13mm wider than desired). I usually work in A3 – I wondered if you are able to advise me on equivalent page sizes, so that I can mark out an American standard page dimension within an A3 page? I want to make sure I produce my art at the correct dimensions. That blog post is this blog post – how exciting. It’s actually a very useful question, the answer to which is relevant to artists when they’re beginning the process of sketching, so with Rik’s kind permission I’m doing a blog post on it. It’s probably too late to say that.)Īn interesting question this morning from one Rik Jackson on the topic of drawing to scale. Hello all, happy new year! (Is it too late to say that? It’s mid-January.
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