04/06/2026
Ever wondered why paper sizes are called A4, A3 or A5?
It is all designed to scale perfectly.
When you fold an A4 sheet in half, you get A5. Fold A3 in half, you get A4. Every size keeps the exact same proportions, which makes designing, printing and resizing much more efficient.
Simple idea, but incredibly clever.
It is one of those details most people never think about, yet it is used every single day across print, design and marketing.
Print is full of small technical decisions that make a big difference behind the scenes.