Size Illusion Puzzle Pack: Measure, Spot & Solve

A size illusion puzzle pack: guess-then-measure challenges, “which is bigger?” pairs (some equal, some honestly different), name-the-trick, a maze, a word search, a crossword about the people behind the illusions and a true-or-false quiz, all with answer keys.

What’s inside:

- Guess, then measure: six classic tricks over two pages

- Which is bigger? Eight pairs, some equal and some really different

- Name the trick: match six illusions to their names

- Maze: get the eye to the ruler

- Illusion word search (13 words)

- Crossword: the illusion makers

- Illusion true or false

- Answer keys (2 pages)

- Credits, licence & sources

Pages: 12 (including cover and credits). Sizes: A4 (210 × 297 mm) and US Letter (8.5 × 11 in), both PDFs included in one zip.

Printing: Print at 100% / actual size on A4 or US Letter, so the drawings keep their true measurements. Inside pages use light backgrounds and print well in black and white; covers are dark, so start from page 2 to save ink.

Every fact is checked against Michael Bach’s Optical Illusions & Visual Phenomena, Encyclopaedia Britannica and the Exploratorium (checked 31 Oct 2026), and the sources are listed on each pack’s credits page. All drawings are our own; there are no photos in this pack. Drawings, puzzles and layouts are REALLYBYTE’s own work. Not endorsed by Michael Bach, Britannica or the Exploratorium.

Licence: personal and single-classroom use. You may print as many copies as you need for your own family or your own class, and share it with your class through a password-protected platform. Please don’t resell, re-upload or share it publicly. For school-wide use, please email info@reallybyte.com.

Made by REALLYBYTE, the team behind size.illusions.im. Questions: info@reallybyte.com

This is a digital download: no physical item will be shipped.