Rulers by Père Alex & Marchand de trucs

Give your audience a striking visual puzzle with Rulers by Père Alex & Marchand de trucs. Two wooden school rulers—one marked in centimeters and one in inches—seem to change size when their positions are reversed, before the finale reveals they are exactly the same length.

• Classic illusion: The effect revisits the well-known illusion made famous by psychologist Joseph Jastrow.
• Clear visual contrast: The centimeter and inch markings set up the changing comparisons for a direct, easy-to-follow presentation.
• Wooden presentation: The set includes two wooden rulers and a specially crafted wooden box.
• French instruction: An instructional video featuring Father Alex is included.

Present it as a playful clash between metric and imperial measurements, then let the rulers’ changing appearance set up the final reveal. It’s a visual illusion to add to a close-up or parlor magic repertoire.