I face a great challenge in knowing what exactly bleed should I use in my document with A4 and another in A5. Actually, this will help me to guide printers on what should they suppose to crop.
There's no "exact" amount of bleed.
There's often a minimum which can vary, but generally if you use .25", 1p6, or 3mm (as @SaturnsEye suggests) things are fine.
Print providers use crop marks to know where crop. They do not measure in from the outer bleed edge. The size of your bleed is largely irrelevant as long as some bleed exists.
In addition to Scott and Saturn's useful input, it may be best just to ask your printer how much bleed they want to use. For regular-sized products like the A4 and A5 you mention, a standard size like 3mm or .25" should be fine.
Be aware that, using most publishing software like InDesign or QuarkXPress (if anyone still uses that...), you can create
I believe you are asking how to setup a document with a bleed:
- InDesign go to
File -> New
- Make sure to set
- Click the expand button and the Bleed and Slug will appear:
- How to setup crop marks on file export:
In regards to "what bleed should I use" I would consult the printer because they may already have a template prepared for you. Reference: "What should you ask the printer?". If you are mistaking crop marks for bleed reference: "Using cropmarks"