Warning: Please do not build a house using this book.

Packed with handy measurements and conversion tables, fun trivia, and hilarious measurement-related dad jokes, this genre-defying book is a 6-inch ruler that’s half an inch thick, complete with tick marks down the spine.

Is it a book? It is a ruler? It’s both – and it’s also a great conversation starter to boot! Whether you want to peruse a collection of fascinating facts, or if you’re caught without a tape measure during your next DIY building project, now you can easily convert between centimetres and inches, yards and feet, ounces and grams, and bore the whole family with amazing facts about zeptoseconds and the Waffle House Index.

How many books would it take to be as tall as Godzilla? And what common food do countries use to measure how rich they are? Filled with puns, groan-inducing dad jokes, and much more, This Book is a Ruler makes the perfect offbeat gift idea for an bibliophile, builder, or crafter you know.

Every attempt has been made to ensure this book is an accurate ruler... just don’t build a house with it.

Grab your copy today!