Have you ever needed to print something but didn’t remember what size it should be? Was it A4 or Letter? What even is Tabloid? That awkward little moment when you type “A4 in inches” into Google and skim through the image results… PaperSizes exists exactly for moments like this.
Designer Rob Lafratta and Rich Franklin originally just wanted to make their lives a bit easier. Inspired by a scrap of paper taped to the wall with a list of common paper sizes, they decided to turn it into something online. The result is papersizes.io—a clean and useful tool that displays all international paper sizes with style and simplicity.
So what does it actually do?
The moment you land on the site, you’re greeted with a grid of hundreds of paper sizes. A series, B series, ANSI, North American, photo paper, drawing pads… you name it. Each section comes with a short description, comparison tables, and a handy unit switcher between metric and imperial. Oh, and yes, there’s a dark mode too. 👏
Whether you’re setting up a print job, designing a layout, or working with typography, you can solve the “what size is this?” question in under five seconds. And it works beautifully on both desktop and mobile.
What makes PaperSizes great is its simplicity. No unnecessary features, no annoying “premium” paywalls. It’s one of those tools you discover and immediately think, “This is too good to be free.”
Let’s face it: paper sizes are unnecessarily confusing. A4, Letter, Legal, Executive, ANSI B… Even if you’ve memorized them once, you’ll forget again in three weeks. This site eliminates the need to memorize anything. No more sticky notes on the wall.
PaperSizes isn’t a revolution, but it’s a clever, elegant solution to a small everyday problem. If your life involves design, publishing, printing, or just lots of paper, you’ll probably want to keep this tool close.
Bookmark it—you’ll need it one day.
