If you’ve ever had business cards, flyers or posters printed, and been told “you need bleed lines”, you might have panicked and thought “I just wanted some business cards, not a graphic design degree”, and that’s totally normal. I was like that at one point. But, don’t worry, you’re not alone, and i’m here to explain it in plain English.
At Tee Prints Studio, we want to make your printing journey smooth, as stress-free as possible, and free from costly mistakes that can make or break the end result of your overall print quality. This guide is for everyday customers who want to supply their own designs, but aren’t too sure on bleed lines, what bleed lines are for, what they mean, or how they work. Let’s clear this up in one place.
What are ‘Bleed Lines’ in printing?
Imagine you’re cutting a cake {mmmm, cake} – sorry, where was I? – You want nice, clean edges, right? But sometimes the knife might slip ever so slightly, and you cut too close to the edge. Well, printing is like that, too.
When we print and trim your design, there’s a tiny movement (we’re talking millimetres) that can happen during cutting. Bleed lines are there to save your print from disaster.
In a nutshell: ‘Bleed’ is extra space around your design that gets trimmed off.

Why bleed lines matter!
Without ‘bleed’:
- You could end up with ugly white edges around your design.
- Your layout might look wonky, or off-centre.
With ‘bleed’:
- Your background colours and images will go right to the edge, without any awkward gaps.
- Your final product will look clean, professional, and exactly how you imagined.
How much bleed do you need?
Standard bleed size:
For most business cards, flyers and posters, the bleed should be 3mm around all edges.
For example:
- UK-standard Business Cards are sized at 85mm x 55mm
- With bleed, your design would be sized at 91mm x 61mm

Safe Zones: Your content’s best friend!
So now, you’ve got the bleed sorted – but what about your text and logos?
Don’t put anything important too close to the edge.
Keep all key information at least 5mm from the inside edge (this is called the safe zone).
Why? Because if the trimmer moves slightly, you won’t want your logo or phone number chopped off. This of the safe zone as a comfy cushion around your design.
Common mistakes, and how to avoid them.
- Sending designs without bleed – resulting in ununiformed white borders.
- Too close to the edge – risks being chopped off.
- Using low-resolution images – makes prints look blurry/pixelated.
- Wrong colour mode (RGB) – colours might print dull or strange.
Always ask your designer to check your files before giving a final authorisation to print. Check your design software for bleed areas and settings. Most online design programs like Canva let you add a bleed – you just have to make sure it’s switched on, or visibly active.
Quick checklist. We’ve got you covered!
- Add 3mm bleed on all sides.
- Keep text and logos at least 5mm from the edge.
- Save your file/design as a PDF, JPG or PNG (PDF preferably).
- Set your colour space to CMYK (not RGB)
- Check your resolution – aim for 300dpi where possible, for sharper prints.
Need help? Just ask!
If all this sounds a little too tricky, no problem. Use our contact page. We are happy to help.
If you are using Tee Prints Studio for your printing, we are happy to check your design (free of charge) to give it a once-over for a final assessment on whether it’s the correct format or not.
Or, if you’d like, we can design your business cards, flyers and posters for you. Please contact us to discuss this, and we will be happy quoting you for this – this option ensures your prints will be perfect from the start.

